If you use the south exit out of the airport to 417, there are 2 $1 toll stops if you get off at exit 6 - International Drive (which you would use for Epcot & Downtown Disney Resorts). I believe if you exit at exit 3 - Osceola Parkway (All Stars/Animal Kingdom) it's another $.50.
Not sure what the tolls are for the north exit to the Beeline Expressway.