Dol ost of reseach on leo care before you purchase one. Normals are pretty cheap. I would start with just one until you get the hang of things...its best to house babies seperate to prevent spread of disease, stress related disease, early breeding, male to male fighting etc..etc...
To start a set up you will need a ten gallon tank (or some other containor of equiv size) a safe substrate they cannot injest (paper towels, newspaper, lineliom, tile, indoor/outdoor carpeting, non adhesive shelf liner), 3 hiding spaces (one warm, one cool, one humid/warm), an UTH or low wattage heat bulb (or both), a good thermometer (a digital one with a probe or a temp gun, not the stick on kind), a constant supply of small crickets and mealworms, a water dish, a small dish for calcium, and calcium and vitimin powder.
I dont have time to get into a lot of care issues....do some searches for leopard gecko care. There are also links to good caresheets in some of the breeders signautres. Anyone who is a breeder and has a website that posts on this forum will also have caresheets on their websites.

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0.1 Bearded dragon
0.1 mexican Black kingsnake
1.1 Leopard Gecko's
0.0.1 Tokay Gecko
1.0 Blue Tongue Skink
0.0.1 Reverse Okeetee Corn
0.1 Anerythristic Corn
0.0.1 Red Tegu
0.1 Bullmastiff
4.1 Cats