At the height of 6 foot and weight of 160, here's what you should do: Eats lots of protein, squat, drink at least half a gallon of milk per day, and keep trying to move up in weight on all your lifts every workout. After two months of doing this, you will be very surprised. If you have just started, you can gain muscle and lose fat at the same time.
My guess was following a good program and eating 4000+ calories per day will leave you at a much more muscular 180 after 2 months. And the great part, the absolutely great part, is that you will be leaner too.
Pretty cool, huh.
1. choose a routine. Lift about 3 days per week. stick with it.
2. eat 4000+ calories per day. drink that half gallon of milk (shoot for a gallon if you really want to pack it on)
3. get at least 8 hours of sleep per night. A 5 or 6 hour night every now and then isn't going to kill you. Just don't make a habit of it.
You'll be able to make the best gains of your life right now while you're beginning. So please, find a program and stick with it.
If you're looking for programs and lots of good basic weight training info check out davedraper.com