Let's see what others propose, but I would approach it in one of two ways.
First way: I'd apply Penetrene to the junction between the shaft and wheel center, let it soak in for a couple of hours, apply more, and so forth. Then I'd use a brass drift and a 3 to 10 pound hammer, to tap the wheel center both on and off the shaft, trying to get it to move slightly. If after a few repetitions (more Penetrene, more tapping) it moves at all, you will get it off just by continuing that process.
Second way: I'd remove the valve from the stem, break the bead loose with a rubber hammer, then apply a couple of proper tyre levers to pull the outer bead over the outer rim, pull out the tube, and use the tyre levers again to pull the inner bead over the outer rim, with a bit of help from the rubber hammer. Do not try to do this with improvised tyre levers, use real ones, or you will just ruin the tyre without learning anything.
The first method nearly always works. The second method, provided the tyres are scrap, always works. (The first time you do it you often damage the tyre, so it is good to make your first attempt on a junk one.)
