Quite apart from your knowledge and skills on the bass, make sure your teaching skills are up to par. It is one thing to know your stuff...quite another to be able to convey it in an understandable way to a complete beginner.
The very first thing I would teach a complete beginner is safe and efficient technique, good posture, how to hold the instrument etc. I would advise gentle warm up stretches before and after a practice. This could be followed by learning the notes on the fretboard. I would encourage him/her to listen carefully to simple songs that they like, and then try to play along without using tab. When it comes to basic theory I would put equal emphasis on both scales ....and chord tones.