It is not clear how long they should live on average.
It is however known that the average lifespan of all the races has tended to decrease with each generation as their members move further and further from the Nemed and Anesidora.
Men of the first few generations aged very slowly and typically lived for several thousand years. (Note that the Age of Dragons was far longer than all the subsequent ages combined.) Most (perhaps all) of those men were killed by the extreme violence of the Godswar. The shorter lived humans were able to breed faster and better survive such conditions, driving the average lifespan down.
The Elves were originally humans who were dear to Sucellus, and whose god protected them from all the horrors of the Godswar until almost its very end. Their life expectancy did not become any greater than that of their human ancestors, but it did not decrease nearly so fast as their more distant cousins. (I suspect that the Elves would call Nemed and Anisedora the first Elves, and would consider humans to be as degenerate an offshoot as humans consider Orcs to be. The Svarterlfar especially are racial supremacists, but even the Ljosalfar tend to look down on the short lived humans.)
By the time that Kylorin established Patria as single empire that ruled over all of humanity, I'd guess that the average human life expectancy was probably around 500 years. There were still some men who were fewer generations removed from the source of life and so lived longer, and some who were further removed and lived shorter lives.
Perpentach was able to survive for several centuries imprisoned in the Tower of Eyes, and was centuries old before being imprisoned. His body was very near death when a traveling carnival finally came close enough for him to control, but a modern human body would have died lone before that. His original body is dead now, but he transferred his consciousness to new host. As modern men are not so long lived, he may have to do this several times in the Age of Rebirth.
The harsh conditions of Age of Ice drove the average life expectancy considerably. Among most peoples, it became rare to live even to age 40.
Since conditions have gotten better in the Age of Rebirth, the average human lifespan has begun to increase. It is now at about the point where it was during most of recorded history in the real world. Many people still die young, but a significant minority live into their 80s and 90s.
I believe that Kael once said that the Bannor of the late Age of Magic lived at least twice as long as the men of the Age of Rebirth. Some of those who were children when their citadel was cast into hell were still alive and well 160 years after they emerged back into Erebus. Those with the noblest blood among the Bannor continued to enjoy great longevity (if they did not fall in combat), but most of the Bannor interbred with other humans and diluted their advantage. By the time that Capria died, the Bannor lived no longer than the humans of other nations.
It is not clear what modern Elvish life expectancy is. We do know that a 40 year old elf born in the Age of Magic would still be considered a little child. I would guess that most elves born in the current age could only live to be about 500. However, there are plenty of 600 year old elves still alive from before the Age of Ice, and they are not considered elderly or even middle age yet. Elves who were born in the Age of Magic and grew up during the Age of Ice would probably form a significant majority of contemporary elven society. Those few who can remember life in the Age of Dragons are now revered elders.
Among the Once-Elves, a roughly 600 year old Varn Gossam seemed to be treated like a teenager by his elder brother. It should be noted that a couple centuries of that time were spent in the Netherworld though, where no one aged at all.
Dwarves of the first generation created by Keldon Ki are said to be immortal, or at least impervious to age. Bambur might be the last of these still living. Dwarvish life expectancy has decreased more rapidly than human, but not yet gone so far. The Age of Ice did not have much of an influence on the Khazad life expectancy, as they lived underground about as comfortable during it as they did before and after. There are still plenty of dwarves in the Underhome who are about 500 years old. I'd guess that the Khazad dwarves born in the Age of Rebirth are likely to live closer to 250 years. The Luchuirp are less hardy than their cousins, and so I'd place their life expectancy at closer to 200.
Orthus was already an adult during the Age of Magic, and he managed to survive the whole Age of Ice and into the Age of Rebirth. That means that there are at least some Orcs around who have lived about 500 years. I tend to think that most Orcs, Goblins, etc are quick breeding and quick dying, and so do not live as long as modern humans. It should perhaps be noted that Orthus was originally a Bannor noble of the highest rank, the closest friend of the last king of Old Braduk. The nobles of that age were typically fewer generations removed from Nemed, and so longer lived. I suppose it is also possible that his longevity might be increased by the Matron Essendi, the holy scepter of the high priestess of Bhall which he stoke and affixed as the handle to his axe.
The Aifons are all gone, but if they had survived they would probably have similar longevity to the Elves as Danalin shielded his favored people from the Godswar just as much as Sucellus did.
The only surviving descendants of the Aifons are the rare Blue Lizardmen, which actually descend from hybrids made by archmages in the Age of Magic. (The Green Lizardmen were made from Elves, and the Grey Lizardmen from Humans.) I suspect that none of these hybrids (which also include Lamia and and Centaurs) have as great a longevity as the beings from whom they were made.
I think natural hybrids (which tend to be half-elf and half-human, although I suppose you might even count the descendants of a Bannor noble and a more base human) tend to have life cycles closer to that of the shorter lived parent's race. Kithra Kiriel seemed much more human than elvish when he was growing up, although Hemah's dream seems to have caused the Elvish nature from his father's side to become dominant.
Satyrs are basically a type of elven Aasimar, descendants of elven woman and Cernunnos himself. Only the male children inherited horns, while the females looked like normal elves. I suspect that their life expectancy is the same as that of normal elves. There may still be a few highly regarded Satyrs of the first generation who have survived since the Age of Dragons, but most are the modern descendants of those and mortal (mostly elven) women.
The vampires of Erebus are living (not undead) beings who are psychopathic enough to voluntarily choose to use a dark ritual to consume the souls of their murder victims. This allows them to steal the vitality of their victims. The primary benefit is that the vampire can add all of the remaining years of his victim's natural life expectancy to his own. (This would make young elves vastly more desirable victims than older humans.) Feeding on youthful victims also allows a vampire to restore his appearance to a similar level of youth, feeding on healthy victims allows him to restore his own health, and feeding on physically strong victims allows the vampire to gain that level of physical strength. A vampire could live quite well only feeding once every 70 years (or much longer, if the victim is an elf), but most of them are so vain and so cruel that they prefer to feast far more often. They still have all the bodily functions of mortals, and often have huge appetites for sex and exquisite food. No vampire needs to drink blood, although many do acquire a taste for it and some even enjoy cannibalism. (It is not clear, but I think that they might need to use some of their victim's blood in the ritual, perhaps using it to paint certain runes.) They heal much more quickly than normal mortals, at least if they have consumed enough souls recently, but can still be killed by any injury that would be fatal to an ordinary living man. Their only characteristic weakness is direct sunlight, or the light miraculously produced by the priests of Lugus. This robs them of all their superhuman abilities that their dark rituals give them. (Since many vampires depend on feeding on strong victims to maintain their strength, rather than keeping an exercise regimen, the light may leave them so frail that they can barely stand. This of course would not be true of a new vampire that had not yet let his natural muscles atrophy.) It also forces them to feel all the regret that a normal empathetic would feel if guilty of their crimes. This feeling is so foreign to a vampire that it is usually misinterpreted as intense physical pain. It may trigger a panic attack strong enough that the vampire is unable to defend himself in battle, and as likely to injure himself as any of his enemies. Sunlight does not, however, cause any more direct physical harm to a vampire than it does to a normal human. Since vampire normally avoid the sun too much to develop a tan they might be particularly vulnerable to sunburn, but no more than a regular human who keeps similar hours and spends as much time indoors. Sunlight alone will not kill a vampire, only make him easier to kill.
