How to change my body fast and effectively? IM TOO SKINNY!?

All my joints and bones, (elbows, wrist bones, shoulder bones,collar bones, ribs etc) stick out. Some more then others. Im an ectomorph. Im 6'4 and is currently 150 pounds exact. Thats super bad! Because 2 months ago I started working out to change my skinnyness. I researched everywhere to find out how to properlly work out, and I think I gained about 10 pounds in like 3 months. 10 pounds of muscle!? Thats pitiful. You cant even tell. I dont look any different. I wanna be big, or atleast exceptional in society to not have to hide behind long sleeve shirts and jeans so people dont realize that im a really underweight GIANT. :/ its sad. I hate my life because of this. I try to keep up on calories and stuff but...its just so hard having a job and still having to eat every 2 hours. I just dont have the time or the money to buy all the food i need. It sucks. Cuz before highschool I was about 5'9 probably and looked pretty cool. I didnt worry about anything on my body and wasnt anything near self concious. But ever since highschool I lost all my weight like OUT OF NO WHERE!? And now Im graduated and standing at 150 pounds and is well beyond 6 foot. This sucks. I need some way out of this! ANYONE CAN HELP!??