Hi, for transport service, you may tele your hotel to book it. Most of the hotel will provide transport between the airport and the hotel.
You can also ask for the the hotel weather it provide tourist bus to Disneyland or not. If not, you may take MTR or public bus to get there.

I suggest book from a travel agent or find a car rental co. online. It is expensive to rent a car in Hong Kong, and better not to ask for service from hotels, which are usually more expensive.