I know you're young and you know everything, because I was young and knew everything once, too. It fades. But seriously, take these guys' advice. Ain't no magic bullet, bro. When you come onto a forum that's all about juice enthusiasts, and they unanimously tell you not to juice, it might be for a good reason. Or maybe they're all just dicks.
I was not much bigger than you when I started training (naturally), actually about the same size adjusted for height (6'1 165). You do not need juice, you need to learn how to eat and train. You might think you have those in the bag (I did, too) but your stats speak for themselves as mine did. I did GOMAD, ate until I was sick every day and a very simple 5x5 program 3 days a week, and put on 30lbs in a few months...light years more than I ever accomplished doing routines you read in bodybuilding mags, and eating like a hippie (with a couple of protein shakes thrown in) so I didn't get fat--LOL. Trust me, I have skinny-guy genes too. So fucking what? You have the cards you're dealt, you do the best you can with them. You can't change your genes, so focusing on them is just not productive.
Read up at stronglifts.com, buy Rippetoe's books, DO SQUATS AND EAT. Shit works.
Steroids are only an adjunct, they will not compensate for deficiencies in diet or training. When you get your diet and training locked-on, and are gaining 5lbs a week, you will realize you don't even need it. At your age and training level, you can achieve a rate of progress without drugs that pros can only dream of. Trust me. Get yourself to 200lbs lean and then think about some chemical enhancement...maybe. Train for performance--put more weight on the bar every week and log all your lifts. Weigh yourself once a week. If you aren't gaining weight, eat 500 more calories a day. Repeat that until you gain.
TRAIN FOR STRENGTH. The size will follow.