sizes

Hi everyone, does any one know the socket sizes I will need to take off my brake caliper bracket?

I went to suntire the other day to ask them which size tires i should get for my 72 Buick skylark. I want the muscle car type look with some fatter tires in the back and some smaller ones up front so it looks almost like ther backs lifted a bit. He gave me the sizes 215/45/17 for the front and...