iPod touch Replacing a cracked screen, and repairing scratches

[MonoChome]

Hey, recently I've been looking for additional ways to make money, and I want to repair Ipod screens and scratches, and then sell then.
However I'm not sure of what screen repair kit to purchase. There's a large variety of repair kits. Which one should I get?
Also, I want something for scratch repair on my Ipod, I've heard Ice-Creme works. Has anyone here tried it?

Thanks.