Mr.pahuja,
1.How to reach Regal-Oriental-Hotel (Kowloon) from the air port? Take A22 airport shuttle bus directly to Regal-Oriental-Hotel. It costs HK39.
2.Nearest MTR station from Regal-Oriental-Hotel---Lok Fu MTR Station. If you walk, you may take around 25 minutes.
3.details as follow:
a.Hong Kong Heritage Musem: mtr from Lok Fu to Sha Tin and then walk along Tai Po Road back to Hong Kong Heritage Museum.
b.Hong Kong Museum of Art and Hong Kong Space Museum are very close to the Avenue of Stars. Take mtr from Lok Fu to Tsim Sha Tsui, walk to the Avenue of Stars and visit them on foot.
c.Hong Kong Museum of Coastal Defence: take mtr from Lok Fu to Shau Kei Wan and take a taxi to the museum.
d.Hong Kong Museum of History and Museum of Science: take mtr from Lok Fu to Tsim Sha Tsui, exit B2 and go to visit them on foot.
e.Disneyland: take Kwung Tong Line to Prince Edward, change Tsuen Wan Line to Lai King and change Tung Chung Line to Sunny Bay and then take Disneyland Resort Line to Disneyland. Time: around 38 minutes. Cost:HK$18.
f.Ocean Park: take Kwung Tong Line to Prince Edward and change Tsuen Wan Line to Admiralty. Exit B and take No.629 bus to Ocean Park.
g.Star Ferry: take mtr from Lok Fu to Tsim Sha Tsui and walk to the Avenue of Stars. Walk along the road to Star Ferry.
h.Macau: take mtr from Lok Fu to Tsim Sha Tsui and walk to China Ferry Terminal near China Harbor City to take ferry to Macau.
i.Golden Beach: take mtr from Lok Fu to Prince Edward, change Tsuen Wan Line to Mei Foo and change 52X bus.
j.Butterfly Beach: take mtr from Lok Fu to Prince Edward. There take 59X bus to Butterfly Beach.
k.Big Wave Beach: mtr (Lok Fu-Yau Tong-Quarry Bay-Shau Kei Wan) and then take No.9 bus.
l.Shek O Beach: mtr (Lok Fu-Yau Tong-Quarry Bay-Shau Kei Wan) and then take No.9 bus
m.Deep Water Beach: mtr(Lok Fu-Prince Edward-Central) and then take 6A,6X bus at Exchange Square in Central and get off at Deep Water Bay.

n.Huc Saa Beach: didn’t know this place.
o.Chi Lin Nunnery: take mtr from Lok Fu to Diamond Hill and then walk there.
p.Hong Kong Zoological & Botanical Gardens: it is located at the north slope of the Victoria Peak. Take mtr(Lok Fu-Prince Edward-Central), get out at Exit J2 and walk to Central Peak Tram Terminus to take peak tram to the Victoria Peak.
q.Kadoorie Farm & Botanic Garden: take mtr(Lok Fu-Kowloon Tong-Tai Po Market) and get on the 64K bus towards Yuen Long (west). Ride for 20-25 minutes. Near the top of the extremely steep hill, get off at the Kadoorie Farm bus stop.
r.Tian Tan Buddha: take mtr(Lok Fu-Prince Edward-Lai King-Tung Chung) and then take Ngong Ping 360 Cable Car at Tung Chung Cable Car Terminal to Ngong Ping Village. Then walk around 5 minutes to Giant Buddha.
s.Please refer to my answer to Hong Kong Zoological & Botanical Gardens.

Way from Regal-Oriental-Hotel to the Airport-A22 airport shuttle bus.