Beginner Gardening: Need help identifying grass type, overseeding advice, 1 by Dave402

Dave402 wrote:
Hello, Just moved to Illinois from Nebraska, in Nebraska had scotts turf builder, it was a mixture of kentucky blue, rye, and fescue. The house I am at now has grass that looks nothing like grass I had in Omaha, and also previous owner cut it real short (like 1") and had no problems. It has some patches where grass is different, so (I am trying to determine whats going on there, plus there is a ton of clovers and small weeds in yard I want to get rid of, just don't know how to kill them without killing grass also. Attached are pics of grass, patches and clovers. I hope to get this figured out soon because I want to fertilize and overseed before winter so I need to know what kind of seed to get. Thanks in advance for any help
pics can be found here

http://s637.photobucket.com/albums/uu94/davidsandine/grass/