start off with the proper nutrition. if your not eatting enough calories your not going to gain any weight. if your not eatting the correct amount of protein, carbs, and fat your not going to gain muscle.
get your diet in order then focus on compound lifts just like this guy did.
http://johnstonefitness.com/ read his section on nutrition also. also check out
www.bodybuilding.com for more compound lifts and their forum is awsome.