TTC is also the MK stop for the Downtown Resort Hotels and the Shades of Green Hotel. It is also a location for the WDW buses when the monorails are not working.
Just to make sure there is no misunderstanding, regarding the buses to other parks, out of TTC. WDW buses, normally, go to AK and HS only. There are NO WDW buses to the waterparks, DTD or Epcot from TTC.