1) Is fine up to the turn. I think 12c is fine preflop. These guys play bad enough postflop that if you can narrow it down to one or 2 players and then bet, bet, bet most boards you will be money. Turn is an obvious check/fold with 2 passive players in.

2) I would bet 3/4 pot instead of full pot since you arent really scared of anything. you probably wont get paid unless someone has 2 pair+ though.