Hello all. Building a new house with a garage that will barely fit two cars. Going to make it into a shop with 1 car duty.

As you can see from the pictures, the walls are cinder blocks, floor is going to be concrete.

Should I ask my builder to put some 2x4's and insulate the walls?
Any ideas on what I should do for the floors?
I'm in northern NJ, near NYC.

Thanks much in advance.