Yes
Yes, there is damage but it is all cosmetic. Damaging a vehicle will not effect its drivability or handling.
no
I would say 20's depends on the car
no just get Driver San Fransico
No
you just amke it out of shapes... and a lot of time and patience
you can't actually leave your car you can but not conventionally, i.e. motorcycles and/or certain cutscenes other than that there are no possible ways to get out without cheats/mods.
no
Nope, sorry
Midnight club
well you can if you crash with a bike
Mods