Strategy Question

[bobbycharles]

Please help me with my thought process on this.

$6.50 Turbo PokerStars
6 of 9 players remaining.
Blinds 100/200

BobbyCharles 2560 chips - Small Blind
Villain 1540 Chips - Big Blind

Folded around to me with K T offsuit. I'm looking to take down the pot here if possible so I raise to 800. Villain goes all in. It's another 740 to me and I call.

Villain turns over A 5 off. You know the rest of the story.

At the first bet: After folding around to me, was this the right sized bet?
After the all in: Granted K T is a mediocre hand at a full table, but KT heads up is better than mediocre and is a slight dog against Ax. Was this a bad call?

Please help me out.