either a cab or go to www.golynx.com that is the local transit authority. they have a trip planner to help you get exact bus routes as there are 2 different routes that service wdw
have no real idea but I would guess $20- $30 if not more
there is a stop in Kissimmee not sure how far away it is from WDW I do know the Orlando stop is a good 20-30 mins or so away depending on traffic lights getting to thr highway