You should have received that in an email when you finished the initial setup/installation. In case you lost it, try yourdomain.com/wp-admin/ or yourdomain.com/wordpress/wp-admin/ depending on where you installed the files.
http://codex.wordpress.org/First_Steps_With_WordPress
Fantastic. Can’t believe I managed without paying through my nose for somebody to do something I don’t understand!!! Thanks James!
