The first floats start from around the HK Cultural Centre at 8:00 pm and the rest will follow for the next hour and a half or so. The last floats will reach the end point at around 10:30 pm.
Admission for the spectator stands: TBA, last year HK$480 / $450 / $300 per person. Tickets go on sale a couple of weeks before New Year and normally sell out the very first day. You can buy the stand tickets at the HK Tourism Office at the Star Ferry in TST and there is normally a limit of 4 tickets per person. Stand Tickets for this year’s parade will be on sale on TBA. Call the Visitor Hotline for inquiries: +852 2508 1234.
more details at http://www.discoverhongkong.com/in/see-do/events-festivals/highlight-events/chinese-new-year-celebrations.jsp