If your garage doors were damaged by a covered peril as defined by your home insurance policy then the door would be covered.
It depends on what your policy says, and what caused the roof to cave in. If it caved in because it was not properly maintained, then the answer is most probably no (say for example the garage is 50 years old and the roof caved in because it just rotted away). If it caved in because it was covered with heavy snow and ice, or a storm or other act of God caused it, then it may be covered if your policy covers outbuildings or other improvements on your property. Start by talking to your insurance agent, but don't give up if they tell you it isn't covered. Read your policy. If it sounds like there is any possibility that your policy might cover it, appeal the denial of the claim and consult an attorney.
No,, That would be covered under your auto insurance policy. Homeowners insurance does not cover damages to street vehicles.
It would cover you under your Buildings insurance
No. Homeowners Insurance does not cover the owners default on a mortgage note.
No.
Since it was caused by the vehicle, the vehicle insurance should cover it. Most home owners insurance companies would probably make a claim against the auto insurance company, if they covered it.
Your homeowners insurance will cover your garage door subject to your deductible since it is part of your house. Your Home insurance does not cover damage to a vehicle though. That's what Auto insurance is for. Your friend will need to contact his auto insurance to fix his vehicle.
I beliieve it does.
cover
Only if you had your jewelry appraised and included it onto your home owners insurance
It just depends on why the wall has caved in. Homeowners insurance is Hazard insurance that provides coverage for certain Perils such as damage caused by Fire, Wind, Hail, etc. Collapsing walls are usually considered a maintenance issue and not an insurance issue depending on the cause. Contact your insurer fro coverage advice.