As Jack says, storage cabinets up against the ceiling over 6' high don't hurt your workspace or parking space, unless you or your vehicle is over 6' tall.
I recomend workbenches that hinge down when not being used, a bench folded up could accidentally be knocked down and cause a bunch of damage to a car parked nearby, a bench folded down can't be knocked down. Just make sure you've got a good system to hold it up while you're working on it.
I worked out of an 8'x8' shed for about a year while rebuilding my workshop and garage. A narrow workbench down each side, hinged with gate hinges to drop down when I needed more room to work around something. Held them up with pieces of 2x4 screwed in place, I could have made a more complicated system, but it only takes a minute with a drill to remove the screws. Pegboard on the back wall with the common tools, I despise pegboard for tool storage but its the only thing space effective. Powersaws etc, bulky tools on a shelf 6' high on the back wall. Bicycles on bicycle hoists raised up to the roof peak. Lawnmower, pressure washer, generator, engine hoist, and jacks are the worst things to store, they all got moved in and out a lot depending on what I was working on.