There are no direct buses to Typhoon Lagoon. One must go to a Disney resort and transfer to a DTD/TL bus.
From Studios and Epcot, there is a Blizzard Beach bus. Last I checked, it was the Coronado Springs bus at Epcot, and the AK Lodge bus from the Studios. Both travel times will be 5-10 minutes at most.
From DAK... you can board most any resort bus, and its next stop will be Blizzard. (Double check with the driver that they will be going there prior to boarding!)
From MK, you'll have to go to a Disney resort and transfer to a BB/AK bus.