If you are getting off somewhere else other than the resort exits those are unmanned. If you are going directly to the resorts those toll booths are all manned.
There are two toll boths between MCO and WDW if you take the south (Greenway or 417) exit from the airport. It will be $1 at each and they are manned. Get off at exit 6 and follow that road into WDW (it comes into the property near Epcot).
After you get off exit 6, just keep going straight, you will pass under the WDW Arch. After that take the 3rd exit and go straight, then right turn into OKW.