http://forum.bodybuilding.com/
Alright, to start with, you want a gym membership
If you can't get that, then I'll try to improvise.
If you want to gain mass, you need to do 3 things1) Eat healthy and often : You need alot of protein in food - no **** calories like coke and candy2) Work out hard, and right. You can find the right form for exercises by simply googling it3) Sleep like a baby. Your muscles rebuild in your sleep so its absolutely necessary
You also have to realize that this will take time, you can't gain alot of mass in a short amount of time without having most of it be fat, so you have to be dedicated.
You want a set routine to work out with - this will depend on how much time you have and what equipment you have.. you might want to buy a standard 45 pound bar and some weights so you can do bench, squats, deadlifts, cleans, power cleans, etc etc - all exercises that are huge mass builders.
I would suggest you go to
http://forum.bodybuilding.com and click the "workout programs" section and post, or just read, there's a good bit of info there.