the guy is asking for help playing the game, not a civ5 critique
there is no map trading but if you get open borders you can scout out their territory. when you get to satellite tech you get the whole world map
for player relationships you have diplomatic overview - global relations (or something like that). you can see wars, declarations of friendships and denouncements. you can also go to an agreement history screen and see who is trading with who
but you can't see a hostile, guarded, friendly breakdown of what each civs think of each other
for game tips try the civ v strategy section of the forum