I want to run the bronze 18's, but I have no idea about offset and tire size. I am going to leave the car stock height so I need suggestions.

 

You might be able to run a (front) 18x8 with +48mm to +53 offset and (rear) 18x8, 9, 9.5 with +53 to +55mm offset and fit tires (front) 225/40-18 and (rear) 255/35-18. It's always good to check with a local shop that knows how to measure offset and tire stretch.