dude if you know nothing about it just read
Age of Conan Wiki - Ultimate Age of Conan Wiki with information on Archetypes, Classes, Lore, Guilds and more.
it's an mmo. They don't change drastically from each other. Different story, different graphics, different combat system, different world, different quests with basically the same themes. If you roll on a pvp server its a huge free for all, any time any where. except main towns.
yes you get xp and an item reward. yes there are special attacks, i.e. combos. Theres also fatalities. money making is both. but sucks right now because there's zero economy, and wont be for a couple months.
there are feats, no i wont name all what, 2 or 300 of them >.> there are also general skills that inhance attributes overall. i.e. hiding ability, endurance, regen, riding skill etc..
There are tradecrafts which also skill (by doing quests, instead of grinding 1000's of the same item over and over).
Youtube if you want videos. the main AoC page also has screenshots.
your best bet for info is that wiki page. it would take me an hour or 3 to list everything about the game in detail. i'd rather spend the time playing, lol.