I doubt you will get any job at a resturaunt. First, you are too young (to legally work, you have to be of a certain age. I believe at 14 you can work, but at very selective places, and you have to get a workers permit. Also, I beleive if you end up having bad grades, you will then be fired. You can also only work between certain hours, and so many hours a week. At 16, you get a little more oppurtunities. Then at 18, you can work basically anywhere). So resturaunt work is probably out of the question, since you can't legally work at one.
Now street magic, do you mean like what Blaine does (Blaining) or busking? Doing what Blaine does, you really won't make much money. You probably won't make any. You may have a chance to make some money from busking though, but before you can even get into that, you have to do your research, and still, it may not pay off well since you are so young. Your best bet would probably be doing kids parties.