Taking the car, you will need to drive over (using the long way, around by Epcot), and park at the TTC. At that hour, you will need to walk into the TTC, as trams will not be running. Only the resort monorail will be running.
OR, you could take the Magic Kingdom bus. It will be running that early.
Either way, be out at the bus stop, or in your car by around 7:15.