How long by express train from Hong Kong airport to Victoria Peak and return journey to airport?

Hey, the train can only take you to HK Station, and the journey takes about 24 minutes. And then you need to walk to the Central to Garden Road. When you reach Peak Tram Terminus, just take cable car there to go up. The whole journey to the Peak would take about an hour. The back journey takes nearly the same time.

Thank you so much for your kindness in helping me about my concern... This is really a big help we are now more excited to explore HK...

I have another question If I want to go to Lantau Island can I go there via ferry? and how much would it cost me?

You can take a ferry at Central to Mui Wo first. Then walk to Mui Wo Bus Terminus to take bus no. 2 and get off at Ngong Ping Bus Terminus. After 45min's bus ride, you will be at Lantau Island.

there is another one from chungking mansion how can I go to Albany Road where zoological and Botanical garden is if Im not mistaken and how much would it cost?