1. Explore is not needed yet, since there are few places to explore.
2. Yes you can VIP another person.
3. Yes profiles are there. Right click on the avi and select "View Profile". If they have setup their profile, you can view it.
4. Click the Hanger icon on the action bar at the top center of you in-world screen.
I can't buy a VIP Membership ; it s done a message "Invalid recurring Price"