Quick Cloth diaper Help and a little info :)

There are a few different types of CDs, all-in-one, fitteds and prefolds/flats. All-in-ones are diapers that have the absorbant layer,fasteners and cover all in one diaper. Fitteds are the absorbant layer, may or maynot have the fasters and need a cover. Prefolds/flats are just the absorbant layer, these need fasteners (snappy or pins) and cover. A diaper needs to be absorbant and have a closure and a cover of some sort to protect clothing from getting wet. All-in-one,fitteds and prefolds/falts diapers can be ONE SIZE fits most with adjustable heights. They can also be sized, xs, s, m, l, xl. Cloth diaper require a Cloth Diaper safe detergent , you can't just use any detergent. here is a good list...
http://www.diaperjungle.com/detergent-chart.html
They also need to be cared for differently then normal laundry...
http://www.diaperjungle.com/washing-cloth-diapers.html
I suggest buying a toilet sprayer, anyone can install it, I installed mine...
http://www.diapersprayer.com/
Or make your own, looks very easy...you are looking to save money right :)
http://gidgetgoeshome.com/2008/08/25/diy-tutorial-make-your-own-diaper-sprayer/
Now that you know the basics, lets talk covers. I prefer Wool Covers and I knit them myself. I knit longies, soakers and skirties. Lanolize them and they are ready to prevent moisture from coming through.
http://www.cookiepants.com/clothdiaperreview.htm
My second choice is Thirties
http://www.thirstiesbaby.com/covers.htm
or something similar. PUL is excellent for keeping moisture in and your clothes dry :) That is a quick run down with help links. Let me know if you have any questions.