Re: Hitting a Parked Vehicle
the other drivers liability insurance will pay for damage the driver caused to a parked vehicle. Collision insurance is what you would carry on your own vehicle to cover damages in an accident which your car was being driven to repair your own car. In that type of accident, each party is responsible for their own vehicles.
and no, your father would have to sue if the other driver does not have any insurance. It is his car.
I am not an attorney and any advice is not to be construed as legal advice. You might even want to ignore my advice. Actually, there are plenty of real attorneys that you might want to ignore as well.