1. Bet turn, maybe 2/3 pot
2. Excellently played. The bluff-inducing check on river is a very underrated weapon, especially against trick opponents......you can out-trick them.
3. standard
4. Nothing wrong. I don't think you can bluff him off his TPGK.
5. Definitely bet turn!
6. Fine
7. Raise or fold or flop. Definitely fold turn. Nothing can help you overcome a J.
8. Nothing wrong. I won't fold JJ preflop against a SS and certainly not against a LAGG
9. Nothing you can do.
10. Fold preflop! As you said, you were too passive even when you hit. Raise flop at least 2.5x for info.
11. IMO fine. There's a chance that villain has 55 to 77 and thinks your high cards missed.
12. Playing OOP sucks. You don't know whether a LAGGY villain has the goods or is just messing with you. Reraise him all-in, I say semi-seriously.
13. Fine
14. I prefer limping preflop. KQs does quite well multi-way. Yes, you have the choice of folding on river, esp. you already know villain is a nit.
15. Fine. Villain's check-reraise screams big PP.
16. The small turn bet smells fishy. He wants you to think you're getting proper odds to chase your overcard+straight draw. If you can't fold on the turn, maybe try to check-call a small bet on river.
17. Yes. You said it, just call the river.
18. Fold. It can't be any more obvious.