Rules for using the background talents are actually printed on the back of the cards... its the only place its printed actually. Also, the designer has acknowledged some balance issues with them and they are redoing them and sending new cards with wave 2. I suggest holding off on them until then.Bounties are wave 2.
My own question here... I keep seeing references to bounty cards but I haven't seen them yet? Are they in the Vasastryous' Lair box? I haven't opened that one yet since I'm trying to keep things simple while learning the game.