Egg Laying Chickens

Well, I would like to get a few when we get the farm. There is a 6 nest chicken coop there already with a large fenced in area attached to the coop. I would ideally like them to be "friendly-ish" and lay eggs. They don't have to produce a ton of eggs - size and color doesnt matter really.

Wondering what are some chickens that might fit the profile I am looking for?

Also should I have a certain amount of them ?

If you have a 6 hole laying box you can have 12 chickens, that's the general rule of thumb anyway. A lot of places won't let you order fewer than 12 anyway. You can buy them from some of the large farm supply places and if you put in a special order they will usually get what you want. I have gotten them from my local co-op when they have "chick days" in the spring I can order from them. I also like McMurrey http://www.mcmurrayhatchery.com/index.html
Personally I like Buff Orpingtons. They are generally friendly chickens but they don't lay very large eggs and won't over-egg you. I have occasionally seen ads where someone is selling their flock of laying hens you might keep an eye out for them if you don't want to mess with chicks. I always buy "sexed" chicks meaning that they have a better chance of being hens then roosters. I have paid extra for sexed and had half of them turn out to be roosters so that isn't always accurate. I don't like keeping roosters I just throw them out of the coop and let them fend for themselves. You can do as cuttingedge says and butcher them if you have a mind too. I don't butcher chicken is just too cheap in the store and cleaning them is a pain in the patooty. Sorry I have gone on let me know if you want to know more. :)

Ok next question!!!

I have been reading various websites but have not seen my question answered anywhere.

Can I have a mix flock of Bantams and Standard sized chickens?

Have you checked out backyard chickens yet?, they have a great web site!!, I went there when we had chicken's, I spent more on feeding foxes so I stopped buying chickens

I think you can as long as they are raised together. If you bought them all as chicks and they grew up at the same time I don't see a problem unless you keep roosters. Chickens will attack and kill any new chicks or chickens if they aren't given a few days to a week of introduction time. I usually put new chicks in a box with a wire lid on it into the chicken coop so the older chickens will get used to them before releasing them into the group.
I had someone dump a chicken off at my house. I thought it was one of mine that had gotten out. I put it in with mine and before I realized it was a "chicken dumping" they had killed it.