Q re NIS passwords

I am having problems with my computer.  I want to send it to repairs but I am concerned about the various passwords I used before I installed NIS 2013 and after.  If I take to a reputable company which I will, can I protect the various information that is dispersed throughout my computer?  If so how do I do that.  Also I have questions below

 

To make it clear to me I need one password for norton online.

We need a second password to log into our vault.

We need a third password to log into the community?