Bumper stickers and dealer emblems are usually attached to a car with glue. The best way to loosen glue is heat, so try heating it up with a hair dryer. Use a putty knife, with its blade wrapped in duct tape to work the label up as the glue warms up.
No matter what size your workshop is, there are some basic safety tools you should not be without. A smoke alarm, fire extinguisher, safety goggles, and first aid kit are absolute must-haves. Plus, all of your electrical outlets should be equipped with ground-fault circuit interrupters. If an emergency ever should ever arise, a telephone should be nearby to enable you to call for help.