I've only had my chicks for two weeks, and I'm no expert. But in my very limited experience, they are not a lot of work at all. There definitely exist much more high-needs animals!
The chicks need to be kept indoors in a brooder (a box, a rabbit cage, etc all work well) under a heat lamp until they have feathered. Usually by six weeks of age they can go outside. The heat lamp should be at 95-100 degrees during the first week, and reduced by 5 degrees each week thereafter. You can feed your chicks a chick starter crumble, medicated or not (your preference). They need constant access to water.
We handle our chicks daily, several times a day, so they'll be social and friendly creatures when they reach adulthood. So far, so good! We started taking them out into the yard to scratch around (they are two weeks old) on nice days, and they will follow us all around the yard. It's pretty cute to see them chasing after my kids' feet.
With new chicks, you need to watch for "pasted vent" which can occur after shipping. It usually shows up a few days after the chicks have been shipped, and is the result of a chick getting chilled. The poop will stick to the chick's butt (hence "pasted vent"), and will need to be removed so that the chick doesn't get all backed up. Two of my chicks had pasted vent, and were easily fixed up by holding their rear ends under warm running water until the stool was soft enough to pull off. One of the chicks did lose a bit of the down around that area, but she's totally fine now and thriving just like the rest of them.
That's all the input I have for now, as like I said I'm just starting out. Hopefully you'll get some more answers.
Check out http://www.backyardchickens.com
for some good information and resources.