1) need better descripton here? are you talking crank, crank arm, or pedal?
2)nope
3)yes
4)nope
5)? its either Throttle or PAS, speed is capped by power level (PAS 1 ,PAS 2, PAS3, .. etc)
6)sure, (just stop pedaling) but throttle only will eat battery faster since you are not adding power by...