I use a big cardboard box and line it with newspapers for the first few days, and then, after the chicks know where they eat, I add either wood shavings (not cedar -- it's toxic) or hay.
So, big box, heat lamp and bulb, feeder and waterer, bedding/newspaper, and chick starter, either medicated or non-medicated. (I get the non-medicated because I am more into the natural/no chemical/hormones way of starting mine). Those are the essentials.
When you get them home it's a good idea to dip each one's beak in the water so they know where it is. Some folks give them an electrolyte solution -- either homemade (sugar/salt in the water) or those Sav-a-chick packs in feed stores. It depends on how stressed the chicks have been (ie through the mail or just down to the feed store).
The heat lamp you need to adjust according to how the chicks act. If they try to get as far away as possible, it's too hot for them. But if they are crowding right under the lamp, they're too cold.
Hope this answers at least some of your questions! And good luck with your chicks!