There is not a direct bus from Pop to the TTC. The easiest way would be to take a bus from Pop to the MK. At the MK, you would then take either the monorail or the ferry to the TTC. You do this without actually entering the MK.
You can also get to the TTC from AK or MGM by taking the MK bus which drops you right at the TTC. Or if you are at Epcot, hop on the Epcot monorail which goes to the TTC.