BB defense

Villian is like 41/8/.7 after about 70 hands, but I did see him check-raise the turn once w/ A-high in the BB after a PFR had bet flop and turn. Anyway, Hero is in BB with A [img]/images/graemlins/spade.gif[/img]6 [img]/images/graemlins/club.gif[/img].

Pre-flop: Folded to SB who raises. Hero calls? <font color="red"> Is it good to 3-bet/call/fold here. </font>

Flop: K76 rainbow
villian bets, hero raises? <font color="red">Again, fold/call/raise. I'm not sure which is better </font>

Turn: Qx
Villian checks, Hero bets, Vilians raises, Hero calls? <font color="red"> Is there any value at all in this call? </font>

River: 4
Villian bets, Hero calls and knows he needs lots of help on his game.

I know that this was butchered, but would love some constructive criticism. Thanks