Lynx is the Orlando public transit system. I believe the bus you want is the number 50 bus. But you can check the site for the info....
www.golynx.com
The cost is about $1.50 pp, one way. Be sure to have correct change. The other thing is that you want to let the bus driver know, when boarding, that you want to get off at SW. Otherwise, he will drive right by. The bus will drop you off at the parking lot entrance..just cross that and you'll be at the main gate.
To return to the TTC, just cross the parking lot at the end of your stay at SW, cross the street, and go to the left. Down that sidewalk, just a little ways, you will see they blue Lynx bus stop sign. Wait there and a bus will be along.
I think that I would take the bus to MK and then the monorail over to the TTC from BW but that's just me. The wait for a boat can be long, and a lot of folks don't like to walk it.
I believe Mears also has a shuttle that you can book, but that will be more expensive. About $18 or so pp, r/t. But, you don't have to get anywhere else..they come to you.