I used to take the top off by myself, but my back won't let me know, or let's just say that I am not going to attempt it. However, if you are eager to try and nobody is around to help, you basically get inside the 4runner and push it up and walk it back a few inches. Switch positions to kind of put it across your back like you would be doing a squat and lift it up and walk to the back of the vehicle. This is where it gets tricky and scary, and I can't remember quite how I did it except that I would get the top to the point where it wants to slide off of the back, crawl out, reposition to squat the full weight of the top and then walk it back and set it down.
Not fun, but if you reaaallllyy want the top off..there ya go.
If you have carport, make a pulley system with ropes and straps. I had mine set up with a board through the side windows. If you are worried about leaving it suspended, you can either secure it while hanging, or lower it on the ground on to some furniture movers(boards with rollers) and roll it out of the way.