You can take bus A22 form the airprot to the hotel. The 12th stop of the bus route is Regal Oriental Hotel. Just get off there.
1st Day, need you to clarify which museum in Hong Kong. HK Space museum and Museum of art is within walking distance from Avenue of Star where you can see Symphony of Light at night, in Tsim Sha Tsui. Take bus 101 from the REGAL ORIENTAL HOTEL stop at Sung Wong Toi Playground, Prince Edward Road East and get off at Bank of China Tower. Turn into Garden Road to find the Peak tram up to the top of Victoria Peak. You can take bus back to Central/or Admiralty, or take tram down and walk to Central, then take MTR to Tsim Sha Tsui, for museums and the light show.
To Disneyland, the easiest way is to take the shuttle bus provided by the hotel. It has routes to Disneyland. I don't know the bus fare. Or you should take bus to the nearest MTR Station, Prince Edward. Then take MTR to Disneyland via Lai King and Sunny Bay.

thank you very much, Mr Kevin. your info are very usefull. There is more questions if you dont mind.
1. When we get on the trem and we dont get of all the way long, will we reach the same trem station as we get on?
2.we still confuse to get on the bus from Regal hongkong hotel, where is the nearest bus stop to get on the bus to the airport? if we choose taxi which kind or type of taxi? which one is less expensive than get on the MTR/MRT? we would very grateful if you can help us with that information..We are looking forward to it soon...thank you.

1. Do you mena the peak tram? If you take the tram on your way back, you will get the the same station of course.
2. The nearest bus stop is just about 5 minutes' walking away from your hotel. You can enquire the hotel receptionist about it before your leaving.