yes but there should be no need to do this
Yes you can you just as long as the car is running you can boost just about anything from a truck to a motorcycle
if it is running then there is no need to charge it
No , just when the engine is running
NO! Not necessary.
Definitely off.
It is not illegal to leave your car running while waiting for someone in a parking lot as long as someone (a licensed driver) is in the car.
The alternator - it provides a charge to the battery while the engine is running.
You should not drive a car that is running hot,because you can lock up the engine.
maybe my radiator is defective
Bad ecm
No.
It will do no harm.