I wrote a book... I am a very poor person, I don't have the kind of money it takes to advertise this book so no one knows that its on amazon already for sale. How can I solve this problem. Is there somewhere I can advertise my book for a lot less.

You could start by giving us ABers the title.

You should speak with your publisher to help you set up some appearances! After all your success is also their success. Depending upon what your book is actually about, you might be able to get some free air time on Radio as well. On line too is a good venue for spreading the word about things. If we knew more about it, we might be able to offer you more exacting suggestions!

Sounds like you went the POD way which is never a good idea. The only thing you can do is get some copies and shop them around to bookstores in your area. You could ask to do a reading and autograph session. Most books stores make arrangements like that to help unknown authors.