Can I Activate A Used Ms Office 2003 Disk If I Buy A Used Phone (Verizon) From A Non-Verizon Website, How Do I Activate It For My Number And Account?

If I buy a used phone (Verizon) from a non-Verizon website, how do I activate it for my number and account? - can i activate a used ms office 2003 disk

I believe that on eBay or another to go and get a used Verizon phone. But I do not know how to activate them. Should I call Verizon or should I go to the Verizon store? When I go to the shop, I can only ask to be activated to my number?