Within the System Preferences, you can go to "Login" and make some adjustments to what shows on the Login window, I have mine set so I can use change user login name to be able to login as "root", you can also set-up an automatic login of you're the only user.
I'm sure there's a way to have more options by using the "Treminal" but
this whole UNIX thing is a bit beyond my current skill set.
Good Luck,
11dave