Minimum hands to call/raise?

[flantastic]

First hand: loose/passive game.
20-40 PL. 3,000 effective stacks. 7-handed.
Villian is LAG and loves to bet pot w/ any made hands and any draws. UTG calls, Hero calls in cutoff and Villian on the button calls. Flop comes A [img]/images/graemlins/club.gif[/img]2 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/club.gif[/img] SB bets 150. UTG calls. Hero calls. Button raises pot. SB and UTG fold.
What do you call with here? Raise?

Second hand: 10-20 PL. 6,000 effective stacks. 8-handed.
Villian is a tricky TAG and thinks I'm usually full of crap when I bet. He also saw me showdown a small blocking bet earlier in the session.
UTG fold
UTG+1 calls
Hero Calls
MP folds
Villian calls
Button folds
SB calls
BB calls

Flop comes A [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/heart.gif[/img]2 [img]/images/graemlins/heart.gif[/img]. Checked to Villian and he bets pot.
BB calls and Hero calls.
Turn Q [img]/images/graemlins/spade.gif[/img]. Hero bet pot. Villian calls and BB folds.
River 8 [img]/images/graemlins/heart.gif[/img]. Hero bets 400. Villian instaraises pot.
What do you call with here? Raise?