Moving a Premium plan to another site...What gets moved across to new site?

I have a premium site that still has about a year left, I no longer need this site and have already unpublished it. I now want to move the premium plan to a new site, which seems simple enough to do. However, this is a completely new and different site and has nothing to do with the previous one. What gets transferred over to the new site? I do not want any diverts, domains, adds, SEO, accounts, users etc to move across.