Hi, Ms.Joy. It is expensive to take taxi to those places from your hotel. I suggest you make full use of the metro and bus in HK to visit those attractions.
From Kwun Tung to TST ferry terminal, you can take MTR from Kwun Tong to Yau Ma Tei, then transfer to Tsuen Wan line to TST. Get out of the station and walk to the ferry terminal.
When go to Disneyland, you can take MTR to Prince Edward, then take Tsuen Wan line to Laiking. There you can take Tung Chung line and stop at Sunny Bay. You can find the Disneyland resort here.
From the hotel to Ocean Park, you can take MTR to Central first, then take bus 6X. Well, take bus 1 from Central, you will get to thje peak.