I agree with the earlier post. I would like to add that here in Houston the supply houses (all of them)will always make mistakes on the order or deliver the wrong stuff. It is hard enough to deal with this when your time is money and you need the order to be correct, but being a newbie makes the situation a little harder to deal with in my humble opinion.
If this is your first irrigation system get ready for Wire, wire connectors, male adapters, valve boxes, electrical tape, Teflon tape or paste, Pipe insulation, Christies Glue, and Funny pipe and Funny Pipe Fittings . I am sure that rainbird included the valves, heads, nozzles, timer, rainsensor. You may want to get a Quick cutter for the PVC up to size 1" or 1.25" it is a lot easier to use than a Hacksaw.
I think I covered the basics, but I may be leaving something out.
Good Luck