Check out your Admin Dashboard, which can by found by clicking "Admin" on the bottom toolbar -- it has links to all your new tools. Please let me know if you have any questions, and good luck with your new (old) wikia!
It can be transferred from one user to another, only admins can do it. The sad thing is that Rainbow is blocked, since he's the only admin here, there's no way anyone can be transferred admin powers to other than him. But he's not around.