1. Would I fold to a flop push? Possibly, its a case by case but I lean toward no. I play it the same except I raise to 6 on the flop and I bet 3/4 pot on the turn. If he's made, then you don't want to bloat the pot, and you still have 10 outs to fill up and stack him so implied odds are huge for you. If he isn't made, he only has 8 outs to get made (Ad doesn't work ).

If the Ad falls on the turn instead, than you have to play this like you are drawing, because you most likely are. Try to call within your odds and hit a boat.

2. Same except I bet 5 on the turn. You don't have to bet full pot to protect against draws. Usually a potsize bet is overkill, and it bloats the pot with a one-pair hand.

3. I don't like this.

I don't think its necessary to mask the strength of your hand by raising preflop. That deception just doesn't mean anything at 25nl. I just open limp preflop and call any raise.

On the flop you minbet. Thats a very weak play. Would you have minbet if you had raised pf with AK and hit a Kxx flop? Probably not. You should bet your set just like you bet any other hand on the flop. You are giving away too much info.

I bet 2/3 this flop, and call the raise. Then I check/raise the turn. By that point they know I am strong but are too committed to care.