I'd like to just gain muscle tone. I'm right now skinny and like being skinny, but right now I have ZERO muscle mass or tone... right now design studio is dying down for the semester so I will have a lot more time on my hands.
Toning is more reps and less weight. Without really looking at you and talking to you it will be hard to say you should do this or that. You really have to look at your body and focus on what you want to build on.
The best advice I can give you is this.
Start with going here and selecting a plan for your age. Then hit the gym....
http://www.bodybuilding.com/guides/
These plans are well rounded and can start you on your way. Journal what you are lifting to help you keep track and either ask for help or watch someone that has clearly been lifting when doing an exercise that you are not familiar with. I can't tell you how many times I see people doing an exercise incorrectly thus working the wrong muscles and possibly working to injure themselves.
Also, with being tone, you need to have a solid core. Believe it or not you can really get what you are looking for by simply lifting your own body weight. Pullups, dips and crunches as well as leg lifts and other assorted items can really help to build that core.
Lastly, if you are skinny and you want to put on some weight (muscle weight) then you will need to eat. As you tear those muscles down, you will need to feed them so they can repair correctly. Lay off the junk and move to a higher protein diet.
I hope that some of this helps... If I can help you further, please feel free to PM me.