The TTC is the central hub,
where the buses do run to all the parks, the resorts, and the DTD area and resorts as well.
It is also a hub for the monorails and I think there is also a ramp for the ferry boat as well. I cannot remember exactly where it is.
It is great too, because there are plenty of restrooms, vending machines, etc as well while you wait.
The first time I was down there, it was very confusing to me, because I was trying to get on as much of the transportation as possible on my first trip. I have learned better now

lmao: right!!!), as I go down each year, I try something new. It has made it not so overwhelming!