Wait -- how about Wii Fit? I'm being serious. I'm surprised nobody else has recommended this. We know he has a Wii, and he already said he wants to do this at home, which makes the jogging and gym recommendations not worth much. Wii Fit is nothing spectacular, but you can set-up programs that organize and track everything for you. You can program it to whatever intensity you want. You mix cardio, stretching, and weight training, so you get a bit of everything. For someone who's trying to get started with exercising and doesn't really know where to start, it's actually a pretty great tool. You can always graduate to a gym, jogging, etc. P90X is not what he should be doing. Start with something like Wii Fit and after a few months try out P90X.