He can shoot missiles, fly with his jet shoes, and use a flamethrower in his green and purple power suit. I have also seen him in other suits but I think the green one is his main suit.
Yes, Lex Luthor is jealous of Superman's powers, he is also disappointed in the fact that Superman won't share his powers with anyone else, that he keeps them to himself.
As a teenager, Lex Luthor invented a kryptonite antidote to cure Superboy of kryptonite poisoning, but he had an accident in his lab and caused fumes to escape. Superboy used his super breath to...