middle card pairs and the donkey donks

[PokerBob]

villain here is 45/12/1.7. Other than that i really don't know much about him. These turn spots are very confusing for me. Do I raise? If he's betting a draw, I need to charge his dumb ass. Im he is on total air, do I want to discourage him from firing again on the river? If I raise and he 3-bets, is it not an easy fold? Please tell me what to do.

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is MP with T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, BB calls.

Flop: (4.33 SB) 7[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

Turn: (3.16 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero [img]/images/graemlins/confused.gif[/img]