Transportation from Hong Kong airport to hotel

Travelling with 2 adults n 1 kid age 3+

1. may i know which no. of airport express bus should i take if i stay in royal plaza hotel in hong kong
2. is there a long walk if i take airport express bus
3. how much is the taxi fare 12pm on wednesday to travel by taxi to royal plaza hotel?
4. can i see christmas deoration in hong kong inclusive of hk disneslay on 16Nov-21Nov2011?
Appreciate some reply to the above. many thanks