It is a walking distance from the hostel to Mongkok metro station, thus you can make full use of the metro to your detinations.
From the hostel to Avenue of stars, you can take MTr from Mongkok to Tsim Sha Tsui, then walk there. The fare is about HKD4.5.
From the hostel to Disneyland, you can take MTR from Mong Kok Station to Lai King, transforming to Tung Chung line to Sunny Bay. Then take Disneyland Resort to get there. It costs about HKD18.
From the hostel to Ocean park, you can take MTR from Mongkok to Causeway Bay. Then take bus 5 from Near President Theatre, Cannon Street to the Ocean Park. The cost is about HKD17.
From the hostel to Giant Buddha, you can take MTR from Mongkok to Laiking, then take Tung Chung Line to Tung Chung station. Then you can walk to the cable car terminal to take it to the Giant Buddha. It costs about HKD14.
From the Hostel to Macau, you can take MTr to Tsim Sha Tsui and then walk to China Ferry Terminal to take ferry to Macau.

thank you again:)