I agree with Jenns. Mostly pureed baby food isn't necessary. I completely breast-fed for six months (but bottle feeding would do just as well!), and then introduced food in the form of finger foods. Breads that she could hold in her fist and gnaw till mushy, well-cooked, fork-mashed vegetables, well-ripe, mashed fruit. Carrots are a great finger food for little ones: cook them till soft, then cool. They can eat them cold or a room temperature. Meat cut very fine across the grain. The only truly "baby" food they got was the cereal, for the iron.
I used organic as often as I could afford it, but I don't think I bought a jar of baby food, ever. It's a convenience, and I don't mean there's anything wrong with jars, just that you can do fine without if you want to.