Your question does not give enough details of your damage. What EXACTLY happened? Water damage includes such things as water pipe breaks & leaks, appliance overflows (washer, A/C drain line), roof leaks, wind-driven rain entering around windows & flashings, surface ground water (flood, seepage).
It depends on the type of damage.
The car's insurance would kick in first because YOU gave them permission. Their insurance would pay for whatever is left over.
I've had a similar issue - I was told to make my neighbour personally liable for any damage and subsequently they can make the claim asked the personal liability section of their house insurance. Thus their house insurance settling my claim for damages
Yes, in most cases your neighbor's insurance may be responsible for paying for fire damage to your property caused by your neighbor's negligence. You would typically need to file a claim with your neighbor's insurance company to seek compensation for the damages.
Yes, homeowners insurance will cover garage door damage. You may want to look at your policy to find out what your deductible is. If the deductible is more than the cost of the repair to the door, it would not be beneficial to file a claim.
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.
good way to get hit with an insurance fraud charge
Before a claim can be allowed, a material damage claim must be admitted. There may be circumstances when the interruption results from damage on another insurance Policy - e.g. a supplier's etc. In this case, it is imperative that the wording is sufficient to react to 'any' material damage caused by an insured peril.
No. Probably not. Unlikely. What caused the leak in the water line? Old age? Ground shift? If and only if the leak was caused by a named peril do you have a chance of making a successful claim for any of the damage.
Without anything damaged, lost or stolen there is nothing to claim.
It would be an auto claim for the damage to the other and a homeowners claim for the damage to your property. You cannot be liable to yourself, so you cannot claim the property damage on your auto policy.
It depends on the liability part of your policy, which covers problems caused by people in the home. However, water damage is a tough call depending on what kind of leak or action caused it. In short, the better thing to do is to have the boyfriend pay up for the damage he caused.