Mairzy, also look at storage units, metal or plastic, available in most diy stores and easily assembled. We have them, heavy duty plastic and reasonably priced, and got the garage sorted in no time...and no drilling...
Just to say, re fridge and freezer, most newer models will throw a wobbly and suddenly defrost if you house them in a cold environment like a garage. You may need to add some heat out there during really cold snaps or take advice from the manufacturer of your appliance. You don't want to lose the food in there......