#1; Easy fold.

#2; Bet the turn.

#3; If none of them has a king or a flushdraw you wont win a big pot anyway. Bet the flop but as played the call on the river is good.

#4; I would be very worried if the SB check raises me in an unraised pot, but if your read is that he does this with draws and maybe even worse aces than yours I guess the raise is fine. A call is okey and then take it from the turn.