From Ocean Park, you can take bus 629 to Admiralty and then take MTR from Admiralty to Tsim Sha Tsui. Then walk to Avenue of stars. It costs about HKD20.
From TST to the peak, you can take metro from TST to Central and transfer to bus 1 to the peak. It costs about HKD12.
From HK Zoological & Botanical Garden, You can take bus 23A to Wan Chai Fire Station, Hennessy Road, then walk along canal road east for several minutes, you will get to the Times Square. It costs about HKD5.
Fro, Times Square, you can walk to MTR Causeway Bay Station - A to take MTR to Admiralty and transfer to MTR Tsuen Wan line to Tsim Sha Tsui. It costs about HKD10.5.