Describe the heads of the tamper-proof screws.

If they're the kind that use a flat screwdriver and the grooves curve on the side the counter-clockwise side, then you'll have to drill them to get them out. Almost anything else could be unscrewqed with a special bit, which for the most part can be found at Home Depot or similar stores.

If they have two tiny holes, there's a tool that looks like a pair of pliers with two tiny points sticking out that fit into the screw head. That tool is also available at Home Depot.

As an entrance door, at 30" or wider, you almost always can maneuver standard furniture through it. Sometimes you need to stand it on end and rotate through the doorway; sometimes you might need to do things like remove legs. It's not always a one-person job. :)

I presume you have no other passageway to the outside, like a sliding door elsewhere, or garage entrance, or big removable picture window?

Try and drive out the hinge pins.

The screwheads on the hinges might have an "odd" look to them because they are probably designed for a "no slip" quick installation rather than security. Take a look at the link and maybe you can find the type of head....

Here is a link that might be useful: rack and shelf