The most direct and economical way from the airport to Panda Hotel is airport bus A31. Get off at Chung On Street Tsuen Wan. Walk backward along Castle Peak Road and turn right to Kwan Mun Hau Street. You will fine the hotel. As to Octopus package, airport express travel pass is not suitable. You can just buy ordinary on-load Octopus card or according to your schedule, buy one-day pass of a specific MTR line.
Walk to Tsuen Wan or Tai Wo Hau MTR Station, take Tsuen Wan Line to Admiralty. Then take bus 15 to the Peak top. Wax Musuem is nearby the Peak Tower. Back to Central by bus 15 and take bus 260, 6 or 6A at Central Exhange Sqaure Bus Terminus to Repulseway. Take the same bus back to Central. Then you can choose to take star ferry or MTR back to Tsim Sha Tsui. Walk along the Victoria Harbor till Avenue of Stars.
From Tsuen Wan or Tai Wo Hau MTR Station, take Tsuen Wan Line to Lai King first and then change to Tung Chung Line to Tung Chung Station. Then you can choose to take bus or Ngong Ping 360 Cable car to Ngong Ping Village and Giant Buddha. Back to Tung Chung, there is Citygates Outlets. See around Tsuen Wan last day.