Hi all.. Just need your opinion here. Preferably those with experience in this please...

I bought a disc brake set to fit into my car about a year ago from a seller in this forum. Suppose to fit it in today but I spotted some problem. It is full of rust. The knuckle, the caliper bracket, the rotor shield (that round thing like a shield don't know what is it called). I don't think it is due to me keeping it for one year because I kept it indoors and I bought another set and kept it for the...