All the answers you are looking for are already in this thread. If you read through at least the first 2 pages or so (it only took me a couple of hours to go through the whole thing so first 2 pages won't take long) you will probably have a better understanding of what BARF/Raw feeding is.

This is not the kind of diet you can just jump into, to do it properly you really need to have at least a basic understanding of what goes into the food and why (or just buy a readymade version).