1) I wouldn't 3 bet this even if he's a loose raiser. There are better hands that play better in this spot, KJ is too easily dominated even if he's calling you light. Also if I am 3 betting i'm making it larger like 1ish.

2) I play the same. 3 bet size is good.

3) I also play the same. I would c/r river if I was 100% sure that one of them would bet it, but since you can't count on that obviously bet bet bet is good.

4) I would raise a little more on the turn to like 2 or 2.5 but river is fine if you're going with you're read. I wouldn't say that a min raise is always a big pair though. At these stakes a min raise is a lot of the times their standard raise. There so much goofy shit going on I wouldn't use preflop bet sizing tells unless you have a large sample.