MTR Tourist Pass , Macau Ferry , Hong Kong Airport Express Pass and Airport Shuttle

We are going to visit H.K. Dec.15 and want to start with Airport Express Train to Tsim Shasui staying at Panorama by Rombus for 2 nights. Dec.15 afternoon want to go to Macau , Dec. 16 want to go to Repulse Bay , Disney , Nanjing and Outlet nearby. Will be there with my children and grandson 4 years old. What is the price of above transportation. Understand there are group ticket of 3-4 pax. How much is shuttle bus to airport ? Also myself will want to take a train to Ghuangzhou on Dec. 17. Please advise how I can make train booking without any log in as will be only 1 travel , no need to be member. Do we need to log in ?
Also how is the weather in Dec.15-17 forecast ?
Thanks and Regards,
Palinee