To build muscle he just needs to do big compound lifts and eat. Exactly which compound lifts and which sets and reps isn't that important, so long as he does them properly and progresses on them.
Chinups and pullups can be substituted by setting the barbell on the safeties, lying underneath like you're going to do a situp, and pulling yourself up, keeping your hips up with your shoulders. A horizontal pullup, also called an inverted row. Later you progress to legs straight out.
Once you can do 15-20 in one go, you can progress to chinups etc.