To borrow from another:
Do you have your nutrition sorted out? Daily average calories and carbs/fat/protein for a certain weekly average bodyweight gain goal?
How about routine, what you are running?
I wish I could thank this post more than once!
Meat, eggs, dairy, rice, potatoes, pasta, veggies, beans, nuts - spend your money on these and look up proven beginner training methodologies like 5x5. Supplements are great, but worthless without the fundamentals established first.