First off Welcome! Glad to see you here. Lots of good info and great people here to help.
There are so many colors styles and sizes available that narrowing it down in a short forum post is difficult. I can give you the basics and you can try to obtain a few items that will get some crappie in your boat. First off is where and when you want to fish. Ask your local fisherman what is working best. Usually a 1/8 or 1/16 oz jig head with a crappie tube or lure with good color like black and chartreuse. Bobby garland makes great little plastic baits in the "lights out" color that really attract crappie everywhere in my opinion. The color of the head is a personal choice in my opinion but chartreuse always works well. You can go up and down the isle of the bait store and stock up on many different colors that are working locally. That is how I bought a lot of mine. You can buy off the internet as you want to try out new lures or color combos. You really only need a few jigs each time you go out so start small and buy as you need or want to try new combos.
Trick is to spend a little and test out what works best in your area then buy more of what you need or to buy new stuff to try out. Thing is it will get expensive no matter which way you go unless you show discipline and buy only as you need. I went the other way and have so many lures and bodys and jig heads that I am set to go anywhere to try anything anytime. Did I mention I am broke now?