Gain Muscle and Weight

Eat a shite ton and do something like Starting Strength then move on to something like Greyskull LP.

do what he said. For diet I would go one of two routes. If you wanna track everything very closely, sign up for avatar. If you dont wanna pay, go to ifcalc and plug in your info. Set it to 3 workouts per week, set rest workout split to lean mass, set protein to 3*kg of bodyweight and set carbs/fat spilt to 75/25.

Shoot to gain about 1lbs per week.