Auto insurance typically covers the car, not the driver. So, if you have insurance on your vehicle, but you drive another vehicle that doesn't have insurance, you are not protected by your policy if you have an accident in that other vehicle. However, if you have insurance on your vehicle, and you lend it to a driver (from another household) who does not have his or her own insurance, they will be covered by your policy while they are driving your car.
If you are driving the car it may cover you, but it won't cover a car unless it is on your policy. Depending on your policy it may not cover you either. Some insurance policies don't cover you if you allow another driver other than yourself to drive your car. Check your policy.
It depends on our father's insurance. My children may drive my car because my insurance covers anyone I give permission to drive my car (they have have a valid license). However, my ex-wife's policy does not allow it - by not having this option she actually lowers her premium. This can vary from state to state and insurance policy to insurance policy. Have your father call his agent and get the correct answer for his policy. He may have to make an adjustment to his policy to allow you to drive his car.
Presuming you mean Insurance policy, then Yes you can.
that depends on their insurance policy
An Umbrella policy
Not without insurable interest in a car. If you do not have a car, you do not need to have insurance. If you rent a car, you can get insurance for the rental, but that is a temporary policy. If you have permission to drive the car, you should be insured under the policy of the person from whom you borrowed the car.
Ask an insurance company for a "broadform" policy. That will cover you for any car you drive. Yes, although it's rather pointless. Why pay for insurance on something that you don't even have or own ... there is no need. If you drive someone else's car, you are covered under their insurance policy, provided you have their permission to drive it.
That depends, because there are many different insurance coverages. You'll need to check your own car insurance policy and see if it covers you AND any car that you are driving. If you can't find that information anywhere in the policy then check with your insurance broker and ask. Sorry, but without actually reading YOUR policy that's the best answer I can give.
You have to list the drivers covered to drive your car on the policy. If not he is not covered.