Risk of VPS – Do I share information with other VPS users, like IP? Is it possible to detect that I use a VPS solution? [on hold]

I want to implement a VPS for my business:

1. When I surf and use Websites like Ebay/Facebook, can they detect that I am using a VPS?
2. What information do I share in general when surfing besides IP?
3. When using a VPS is it guaranteed that my IP are unique? I mean, there are so many other customers using the same VPS company, and maybe there could be some problem.