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What Svenler said, plus you'll need an initial investment that can range from $10,000 to "the sky's the limit," depending on what kind of photography you are going to do and who you are going to be doing it for. You'll need a business license, equipment (including office machines), advertizing, maybe some bulk mailings, and you will have to know something about business management, accounting, advertizing, marketing, and so on. Having at least some basic photographic skills will also help quite a lot.
Now about your camera... unless it is truely awful, it isn't the camera -- and it would have to be pretty bad; there are professional photographers that have used things like little pink 110 Barbie Fun Cameras, Holgas, Dianas, box cameras and so on. If you are using one of those 1.2mp digital cameras they used to sell out of bins at Walmart, it might be the camera, but if not, it's you.
About your photographic skills... You will never get anywhere just shooting and deleting. Post some of your stuff and ask for advice. If we can see it, we can see what you are doing wrong and there are people here who can tell you what you need to do differently.