Insurance will cover whatever damage to your vehicle as long as you have comprehensive insurance. As long as you have a HO-3 insurance, it will cover the replacement cost to your house if you take wind or hail damage as well.
Comprehensive
No. That would come under comprehensive insurance.
Existing damage is never covered.
No. that's what Auto Insurance is for. Home insurance covers damage to your home from wind, hail, fire, lightning etc. Likewise, your auto insurance, comprehensive coverage would repair wind, fire, hail and lightning related damage to your vehicle.
no
Yes, wind rain and hail damage is covered
yes, but insurance normally will just say it is totaled and write you a check for the value of a car. its cheaper
NO, Homeowners Insurance would cover hail damage to the home depending on his policy but not to the cars, not his own car or anyone else's car. That's what car Insurance is for.
Purchase Extended Coverage that includes Wind and Hail losses with your Homeowners Insurance Policy. This way future losses will be covered.
No. Hail damage to a car is covered by the comprehensive (sometimes called "other than collision" or "comp") portion of your auto insurrance policy.
I would ask your insurance company for recommendations on who to use to repair hail damage. They may even cover some of the cost involved if your policy covers it.