Bridget, you have bought yourself a reasonably good piece of equipment to start out with, however you must get some training for yourself, either by going on a course or at least spending some time with some other cleaner to get some experience or maybe the guy who sold you the equipment might help you .
There is a lot to learn but a good basoc course will get you on the right road. I will not even try to tell you about pricing as I know nothing about US rates, but do not work too cheaply or you will never succeed. As you are from the States, Bridget you should have a look at the Cleanfax bulletin board, some very helpful people there, and do not forget that marketing your business is very important too. Look up Joe Polish of Piranha Marketing and you will learn a few important things.