First off, how's your diet? Do you know how many calories you need to build muscle? Which foods to eat? Are you eating five or six meals a day? If you can answer those questions with a yes, then good for you- I'd recommend using that proper diet for all it's worth before bothering with supplements.
If the answer's no, or not really, then read this-
http://www.discussbodybuilding.com/What_the_hell_is_a_calorie_anyway/m_135283/tm.htm Follow the link at the end of the article to another post about calorie calculators. If you're not getting the right amount of healthy food in your mouth every day, then the supps won't do much for your gains at all- Get the diet straight first.
As far as a workout routine goes, something along these lines would do-
Monday- chest
Bench press, incline bench press, decline bench press
Tuesday- Legs
Squats, stiff leg deadlifts, calf raises
Wednesday- Shoulders
Standing military presses, side lateral raises, arnold presses
Thursday- Back
Deadlifts, bent over rows, pullups
Friday- Arms
Standing bicep curls, alternating dumbbell curls, reverse curls
Close grip bench press, skullcrushers, triceps pressdowns
Sat/Sun- Rest
And you can throw in an ab workout or two during the week. Do three sets for each exercise, eight to ten reps or so. Make sure you learn the proper form for each one before trying to go heavy with the weight. Rest two to three minutes between sets.