There could be several factors contributing to your Jeep not starting and the battery draining, as well as the radiator overheating. It is possible that adding windshield washer fluid to the radiator could cause damage, as it is not designed to be used in a vehicle's cooling system. However, without further information or a proper diagnosis, it is difficult to determine the exact cause of the problem.
Keep in mind that a blown head gasket can cause the engine oil to mix with coolant and result in a milky white mixture.
