Active job

Removing Wooden work benches and racks + Leveling Garage concrete floor

I'm interested in converting half of my garage into a small crossfit gym. The plan is to remove the old wooden workbench and racks (basically anything that is fixed to the wall) as per attached picture. I also want to level the current concrete floor (if need be open to the idea of layering another concrete on top) so i can place some rubber mats and convert it into a mini crossfit workout area of around (4m * 5m - 6m).