I actually got our granddaughters (GD) first pair of cleats off Craigslist for free, they needed a good family...I took a pair of cleats to the post office and weighed them, bought a fiberous envelope big enough for the shoes to fit in, addresses it, put the proper amount of postage on it, and then folded the envelope up and put it inside another manilla envelope and mailed it the family who were giving us the shoes. When they recieved the envelope they took out the inner envelope and put the shoes in it and gave it back to the postal worker, we got them back after just one full day.
We passed them on after she outgrew them. This is the first year we have bought a new pair and she has played 2 Springs and 2 Falls. She wears a red jersey and we bought a red pair of cleats at Hibbetts. My husband shaved off the front cleat and then sanded it a bit with just some sand paper. Soccer cleats do not have a cleat dead center under the front of the toes. The Referee will make them change shoes or won't let them play, it can damage a person too much.
Shin guards are essential. If your kids wear white or black socks get them at Wal-Mart with the shin guards inside the socks, they are called PeeWee or something like that, Youth size are big for my GD and she wears a size 11 1/2 to a 12 girls shoe. The shin guards inside the sock has a pocket they fit into and that keeps the guard off the skin. If you do but the regular ones due to sock color or something being different then just put them on the bare skin and he can get used to the feel. Remeber to look at the ankle of the guard, some of them have a sheild inside that fits over the outside ankle.