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.
It is generally not illegal to leave your car running while you quickly run into a store, but it is discouraged for safety and environmental reasons. Leaving your car unattended with the engine running can make it an easy target for theft, and it also contributes to unnecessary air pollution. It is best to turn off your engine and take your keys with you whenever you leave your vehicle.
It will do no harm.
No.
Bad ecm