QK limp causes trouble

[Hawkeye27]

Folding preflop has to be too tight, right? Should I raise this pre-flop? Draw heavy flop so I raise to pot-sized bet. Anyone do different? WTF is that turn bet of 15 into a 225 pot? Now 2 pair is very possible. Pos. straight on board. I have TP/2K and nut straight draw. Should I pump it again, or call closing the action? I have to call the river bet right? What do you put BB on?

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (8 handed) converter

CO (t720)
Hero (t765)
SB (t560)
BB (t2895)
UTG (t750)
UTG+1 (t740)
MP1 (t710)
MP2 (t860)

Preflop: Hero is Button with Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls t15, <font color="#666666">2 folds</font>, Hero calls t15, SB completes, BB checks.

Flop: (t60) Q[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets t15</font>, MP1 calls t15, <font color="#CC3333">Hero raises to t75</font>, SB calls t75, BB calls t60, MP1 folds.

Turn: (t300) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets t15</font>, Hero calls t15, SB calls t15.

River: (t345) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets t100</font>, Hero calls t100, SB folds.

Final Pot: t545