I understand that there's more than one popular route, but here's my notes from the last time we rented a car:
Follow the signs for the South Exit from the airport to pick up SR417 South (also called the Central Florida GreeneWay) towards Disney World. Once on SR417, you'll have 2 toll plazas for $1 each.
Bill From PA
Returning to airport (MCO) via I-4 East to 528 East, again watch for "exit ramp" to pay toll in cash.
Get off 528 at its exit 9 (Tradeport). Left and cross under.
Nice cheap gas station right there on the left to top off at. With the gas station at your left ...
get into middle lane, required right onto McCoy, little over a mile is next light (436, Semoran Blvd.) right to go to airport.
I'll leave it as an exercise to go my way and get a pleasant surprise of just one toll (or some day a rude awakening at a brand spankin' new shiny ultra-modern Sunpass only toll booth on the Conway Rd. entrance road to 528 west).taking beechline 528 to WDW there are two tolls
I may have these reversed ...