Hand 1 - Fold. Not comfortable playing against an unknown UTG raise, with KQo. Could easily be dominated.

Hand 2 - Check. Raising bloats a pot, especially as so many 2NL players limp/call ( hardly ever taking into account bet size ) we are OOP with a hand that is hardly ever going to play post-flop well unless we flop a set.

Hand 3 - Fold. It's a fold for me as I feel JTo is a hand that can get you into a lot of trouble, you would probably be able to play it much better than me though. Plenty of 2NL'ers will limp in EP with JT/QT/KT/QJ/KJ. Majority of the time I feel we would be dominated so an easy fold for me.