From Orlando airport you can either get a bus or taxi to the Disney World accommodations. YOu can get an indicative price for a taxi from the dispatcher. Generally it will be chaeaper for more than 2 people to travel by taxi than the bus. I think the bus is $28 return. We were able to get a taxi to take the six of us and it cost about $45 each way.
The Disney World Buses are the only way to go as far as getting around WDW.