I don't know about the Pro-Anabol at 16, not quite sure about the product but I highly doubt you'll need it at your age.
A lot about putting on weight is your diet. Post up what your diet looks like and I'm sure people will help you. Also, post up your training that your currently doing. Exercises/sets/reps. I'd suggest for strength to lower the reps to about 4-6. Neoborn has a lot of this stuff typed up already and he can just copy it out to you if he sees your thread.
Heres the thread: Neoborn's "Where Do I Start?" Bodybuilding Guide - Basic