#1 I like capping preflop because it is the best hand often enough, plus for psychological value. on the flop I think I peel with outs and backdoor outs. whether I raise the turn unimproved depends on my impression of the goofball, so I can't say anything definite

#2 Turn:
The villian may just be betting because you showed weakness. Depends on the read, but folding is the default option, but if he is loose and aggressive enough, you can call down unless the river is K or Q or club to encourage bluffs when ahead or loose the least when behind.

#2 Prior: bet the flop. You want to know where you stand.
Preflop: I say usually reraise here to knock out the BB