1 - Read dependent.. without them this is tough. You say you just sat down so this is hard. I know it isn't always the case, but he has over a 200 bb stack so I think here I would just give him the benefit of the doubt.
2 - I would make is around $3.5 preflop with 3 limpers. I make it 20-25 to go on the flop and get the rest in on the turn.
3 - Whats up with the min raise preflop in Mp1 with QKs? Either make a real raise or not one at all. I like a call here and see what the river brings.

EDIT

Hand 3 - Nvm, I see that it is 25nl... you confused me going from 50nl to 25nl there!