If so, I would do my best to impart some degree of awareness and situational attention.
Being aware and taking care will do wonders for your physical saftey.
I would also sit down and take apart this persons life, see where they go, what they do--see if they are doing stupid things and hanging out with and where people/places trouble occurs with some regularity.
Do my best to impart a healthy level of fear---HEALTHY, just enough so that they don't think they are 10 feet tall and bulletproof--with claws.
A little, a LITTLE, fear is a good thing--keeps you on your toes.
On the physical side, I would spend most of the time on the heavy bag, simple punchs, elbows, knees, etc, some basic defense vs takedowns, some kicks to the knees etc.
Not very good, but better than nothing at all.
Speaking personally, training time is less a question of long does it take???" and MORE of a question of "how good do you want/need to be????"
I mean I can teach someone the basic's of basketball in about 30 minutes--but their chances against people that have been playing ball for years are pretty nearly "zero."
Just my opinion---and worth every cent you paid for it too