I played a game with Arabians yestarday. It was my first serious game since I got Civ4. At the beginning i was doing good ( leading by points ) , but towards the end i got bypassed and ended up with 2000points, while ghandi ( that bastard

) had like 3600 at that time.
That happens. Especially if you fall behind in technology; resulting in not getting the ending wonders, which tends to limit your end-game production. This makes you poor in comparison to the other countries.
So, my quiestions.
1How many cities do you guys usually have? I had 7, thats to few right?
7 cities is very good for a small map, or a standard map. Heck you can even do well with a large map with 7 cities; so long as your goal is not military conquest. Culture victories have been done with only 3 cities before.
2What is the Epic speed of the game?
Epic Speed slows down the production, and research for all civilizations. I personally never play on this speed finding it to drain all the fun out of the game. I'd be alot happier with slower research and normal production with more turns. Too bad Epic sucks.
3I noticed that judaism was alot more popular than buddhism ( which i founded ) , should i aim for founding judaism instead?
The religions are even. You either:
- Failed to build temples, monastaries, cathedrals or Prophet built Temples, which helps to spread your religion faster.
- Failed to grow your Holy City {The city with your founded religion}, which limits your religion's rate of spreading. The bigger your holy city's population, the more your religion spreads.
- Failed to open borders with other countries. Religions only spread naturally to cities that your cities have trade routes with. You can't have international trade without open borders.
- Failed to build Monastaries, or use Organized Religion so you could build Missionaries for your religion. To use missionaries you need to move them over onto the other Civilization's cities. To do this you'll also need an open border; or you'll need to be at war with the civilization to get the missionaries into their borders.
4Towards the end i fell behind in Research. I mean, others were 4 techs ahead of me! I had research at 90% all throught the game! What did I do "wrong".
You did not have as much money as they did. Which is most of the time a direct byproduct of not having enough production to build all the required buildings while still keeping up with your military presence. This is most common when you're a war-monger whos spent most of his time building units for rushes, rather than taking the time to throw up that ever-required bank to earn an extra 10 gold per turn. Trade routes are also your friend; so it's wise to at least be friendly with one or two nations so you can have open borders for international trade. A tip is to not have open borders with civilizations that're literally your neighbors. They tend to betray you, or flood your cities with missionaries even on the lower difficulties.
Also, for some ***** up reason i didnt get a manual with my game, so some of my questions can sound n00bish
The manual is only for people who buy the Special Editions.