There are many attractions in Hong Kong, also there are many ways to tour around HOng Kong on your own, I think the tour bus might not be necessary, as you only have one day, I suggest you go to Ocean Park in the morning, at around 16:00 access to the Peak (the time would be earlier if you want to spend more time on the Peak), at 19:00 get to Central and take Star Ferry to Avenue of Stars, there wait to 20:00 and you'll see the Symphony of Lights show, the show will end at around 20:15, afther the show, you can take MTR from Tsim Sha Tsui Station to Jordan Station to Temple Street Night Bazaar. After Temple Street you can also heading to Ladies Market at Mong Kok.