Hi. Welcome to BYC. This is an old thread, but the question you ask is one that comes up frequently. There may be some good articles regarding brooding chicks in the learning center, or you can type any question or topic in the search bar at the top of the thread. I find that when I read through other folks threads, I get answers to questions I didn't even know I had.
Regarding brooding: you'll want to start those chicks at 90 - 95* under the brooder light, and then decrease that temp by 5* every week. You'll find that your chicks will tell you if they are cold or hot by their behavior. They'll sound stressed, and pile up under the light if they're cold, and if they're hot, they'll sprawl around away from the light, with wings spread. They may even pant. A chick demonstrating this behavior is in trouble from being over heated. Many folks find that the 90 - 95 with a 5* drop every week is really more heat than they need, and are able to drop the temp more quickly. It's also important that your brooder be big enough that those chicks can get away from the heat. They should have an area that is about 70 degrees or even less in their brooder. An other mistake that folks often make, is putting them in a brooder that is too small. Ideally, they should have at least 1 s.f./bird, by 2 - 3 weeks, and 2 s.f./bird after that. They'll be ready to move to the coop when they are fully feathered, and have been without that heat lamp for a few days. You can help them feather out faster and wean from the heat lamp by turning it off for a bit every day, and giving them a nice big brooder to play in.