You mean, if you leave your free company correct?

If you leave your free company, you will lose your private chamber in the fc house. Most of your furniture items can be reclaimed from the housing npc, but I think some bound items may be lost.

You should have received the early access code and the heavensward code when you bought the game. If you haven't, I would take a look at the site where you purchased it or your email. I know amazon stores it, as does the official FFXIV site.

You're welcome and have fun.