Sequence:
Airport north exit
Ramp on right to enter Bee Line (Rte. 528)
Toll #1 - 75 cents
Toll #2 - 75 cents
International Drive
(no more tolls)
I-4
Disney hints:
http://members.aol.com/ajaynejr/disney.htm
If after leaving the north airport exit you go to the first traffic light and turn left (Frontage Rd.), then bear left and go about a mile to the next light, turn left there and instantly make another left, you get on the Bee Line skipping the first toll. Works well except during weekday rush hours.
Return trip back to airport, get off 528 (Bee Line) at Exit 9 Tradeport, cross under, get into middle lane*, right at light after right lane veers off, 1-1/2 more miles to airport skipping a toll.
International Drive continues south all the way to WDW. Double check to find exactly where your hotel is, you do not want to drive a long distance on International Drive itself as it is quite encumbered by lights, use an intermediate exit on I-4 if needed.
* Reasonably cheap gas station there to fill up rental cars, but watch your bearings because it has two exits.