Questioning my play with TT, $5+.50, 5 players left

A few questions on my play..

1. I'm guessing raising was correct here, to force these limpers out, correct?

2. I'm unsure if betting this flop was a good move, as I could probably scare off anyone who has an ace.

3. Folding to his all in? I'm guessing he has something like A-low (I've seen him limp with anywhere from J-3o to AKs, but the only hand he actually bet was a JT that hit top 2 pair. I'm guessing folding against this kind of player is right.

Thanks so much!

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (5 handed) converter

Button (t1530)
SB (t2220)
Hero (t2920)
UTG (t2765)
MP (t4065)

Preflop: Hero is BB with T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, Button calls t100, SB completes, <font color="#CC3333">Hero raises to t300</font>, Button calls t200, SB folds.

Flop: (t700) 7[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t400</font>, <font color="#CC3333">Button raises to t1230</font>, Hero folds.

Final Pot: t2330