moving WP site from one host/domain to another

I’ve been trying to move my WP site from my domain where I built it over to my friends domain where it will live. Somewhere in the process I’ve been locked out of wp-admin on my own domain. When I try to login at my domain it forwards me to the other domain.

PLEASE HELP!

Also, I’ve got the files moved over to the new domain, but I can’t figure out why all the plugins and layout stuff hasn’t moved over.