No, you can only drive the cars listed on your car insurance policy.
An Umbrella policy
Depends on the state and your insurance policy. call your local agent.
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.
yes
A non-owner's insurance policy basically enables someone to get insurance so they can get a license or for any other purpose they need to get auto insurance without owning a car. It covers you in any car that you drive, even if you do not own the car. It is basically a general insurance for drivers because some people who drive do not own cars.
Yes...this is called a "non owners insurance policy". Not a lot of companies issue these but many of them do. If this type of policy is purchased, you are cover in any vehicle you drive.
No, you cannot drive any car in the UK with insurance. You must have specific insurance for the car you are driving.
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.
A named non-owner policy. Or a dealers blanket policy (what car dealers use)
If you want him to have insurance cover in the event of an accident you should add him to your policy. Any body that is not on your insurance policy should NOT drive your car, if they have an accident you'll have big problems.
The answer is "it depends." I know of no insurance companies that issue policies "to drive any vehicle" ... automobile insurance, at least in the USA, is based on the car being driven. In that case, the insurance is actually on the automobile, not on the driver. Therefore, an uninsured car would not be insured regardless of the driver. There may be exceptions, depending on the underwriter and the particular policy involved.