1: Fold it UTG, it's not a hand you want to take OOP. As played, you want to check behind on the turn, essentially telling villian: "Hey, I tried to make a play for the pot on the flop, but you called me. Feel free to bet all your chips on the end" Checking behind induces a bet or at least a check/call when you hit on the river. In either case, I think the river will play itself.

2: Depending on the player, I think a loose call might be in order... if he's a solid player, I'll let it go, otherwise I'll put my chips in; it appears as though he doesn't *want* a call, right?