Think of the TTC as the parking lot for Magic Kingdom. Epcot, MGM, and Animal Kingdom all have their own parking lots. I would park at the park you are going to. If you are going to park hop, all you have to do is show your parking pass from the first park and you don't have to pay the parking fee again. Seems like more work to drive to TTC and then monorail or bus to the other parks and then back. Unless, of course, you want to ride Disney Transport!
Duds