Welcome to HKG!

1. Ave of Stars connects all the way through to the Star Ferry / Harbour City, so no worries there.

2. Not so sure, but I assume so.

3. You can get to the IFC roof garden by taking the elevator up. There are a few restos and such, with benches and places to sit. It's not exactly high in the sky, but it'll do the job. Restaurants facing the harbour will have decent views.

4. In my experience, its been hit or miss. As long as you avoid the main lunch / dinner rush, you shouldn't be waiting more than 15 mins.

5. Victoria Peak doesn't take much time at all, I'd say you'd only be spending about an hour 1.5 hrs tops while up there. Travel time from TST to the Peak should only take 45 mins-1 hour.

Hope you enjoy your stay!