Yes, if your car battery is the same voltage as the ATV battery.
As long as the ATV is wired 12 volt, not 6.
I am assuming you mean with the auto engine running. Yes, that is possible but you are putting a strain on the alternator of the car. An alternator is not designed to charge a dead battery. It is designed to keep a charged battery fully charged. as long as the ATV battery is the same voltage as the car battery, usually 12 volts, you can charge it, or jump start the atv and let it charge the battery itself.
Yes it can.
Yes, the car can be started with the battery charger attached to the battery as a boost.I been doing that for years.
A magneto on an ATV works like an alternator or generator on a car. It creates power, which re-charges your battery and provides power to the electronics of the ATV.
Weak car battery
you charge a atv battery at 2 amps or lower
if you boost charge a battery you should discinnect it from the car. if not you may burn out the alternator
Yes. How old is the battery ? . Is it the correct battery for your car/truck Are the battery terminal connections loose or corroded ? Clean ,tighten Get the battery checked at a local garage ( load test )
It depends what engine it is. If it was just a toy car yes... but if it was a mower no. what about a 50cc atv??
Yes, you can use a twelve volt car battery charger. Be sure to set it on low.