Is there a saying something like you can't make money without money? Well, with the internet this is not true, you can really make money online without paying out a dime.
You do have to pay for your internet service but you can get around that too.
So if you think it was not possible here are some ways.
If you don't have an internet connection try using the library.
You will be limited to how much time you can use their computer so you would have to have all your work organized before you went there so you could maximize your time.
Or how about friends or family, maybe you could borrow their computer.
You do not need to pay for a web site, there are a lot of free web site out there you can use.
Try Squidoo, Hub Pages and Blogger as these are user friendly, rank well with Google and allow you to sell products, including affiliate products from their sites.
You can make as many sites as you want with out charge.
You do not need to spend any money on products to sell, you can be an affiliate and sell other peoples stuff.
Just sign up with an affiliate site like ClickBank and you will find thousands of digital products to market.
Sell these through your free web sites.
How about traffic to your web sites.
You will write articles about the product you are selling and submit them to free article directories where readers can click on a link at the end of your article to go to your site.
All the above steps cost you nothing for making money on the internet and can really be done.