State laws differ so it will depend upon what state you are trying to register a car in if they compel you to have a valid driver's license to do so. Check with your state's Department of Motor Vehicles or similar state agency that is responsible for registration of vehicles to find out what your state's requirements are.
In many states it is mandated that you have financial responsibility to register a car. Typically this financial responsibility is fulfilled by a motorist through obtaining an auto insurance policy that has at least the minimum state required limits.
If auto insurance is needed to register your car, then most insurance companies will require you to have an active, valid driver's license or be able to acquire one within a short period of time in order to start an insurance policy. If the valid driver's license is not obtained in the set time given, then the insurance coverage would be cancelled by the insurance carrier.
It will likely be much easier for you, if you want to buy and register a car, if you already possess a valid driver's license. When you are ready to get car insurance for your vehicle you can get a free auto insurance quote here with us.