Not where I live in Ohio. My mother co-signed a car for me, and her name didnt have to be on the insurance, as long as the vehicle carried full coverage insurance in my name.
Depends on the state and your insurance policy. call your local agent.
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.
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.
It is illegal to drive a car that is not insured for at least third party cover (i.e. if you hit someone then they - but not you - will get paid out). Therefore if the car is not covered on an insurance policy that YOU have then to drive it you would need to be covered on someone else's insurance. Some people hold insurance policies that allow anyone (with permission from the owner) with a valid license to drive the car and in this case you would b covered on this policy - many company cars have this sort of policy. It is you DUTY to make sure that you/the car has as covering policy before you drive it and that you can PRODUCE this policy for the police should they require you to do so.
It depends on the policy in the USA. In most European countries only named drivers can drive a car regardless of insurance policy - rental cars are the exception for obvious reasons.
You do not need your own policy. In most states you are covered by the car owners insurance policy.