Probably so, since your vehicle will likely be impounded.
Yes double the amount you were paying
No, because you were not "Driving" under the influence. You should never ride in a car or allow someone who is drunk to drive a car though.
Yes
that depends on their insurance policy
Is the CAR insured? If not, it's not legal.
You can so long as you have their permision.
You can register it but someone else has to drive it.
Anybody who fits the legal requirements to drive in that jurisdiction, and has permission from the vehicle's owner, can drive the vehicle.
It is illegal to drive in any US state, to drive any car, if you do not have a driving license.
Yes
The car is insured not the driver however many policies have restrictions as to who may drive the insured vehicle.