Hi kpamh and welcome!
If you want to set up a free website without all of the advertising all over it, try
http://www.weebly.com/. It's about as close to having your own independent website as I've seen. You can add the content you want and even as many pages as you want.
I've played with it a little and really don't know much about the SEO aspect of it but it is pretty neat to use.
http://www.squidoo.com/ has google adsense on it and you are limited to just the single page but they do the SEO for you which is a great help. Google really seems to like Squidoo.
Davin's right about Holly's book having a lot of ways to start for free, you can use some of her methods to get up the start up money for your own hosting. If Holly is still running the free website offer through Cheekyo with a years worth of Bluehost, I would highly recommend it when you get the money, she did my website and I am extremely happy with it. Here's a link to it if you'd like to check it out:
http://www.pipelinebooks.com/Hope this helps

,
Kathy