Where "special" just means that the pan has to be of a magnetic material. Cast iron yes, stainless steel maybe, copper no.
Also, good old enamel pots work very well, and they're awesome to cook with.
Depends on a stove. My can only detect proper induction-capable pots, enameled pots don't work, stove shows "F" (like f*ck this?).
Looks like the Scanpans I have (and love) now might not work, but the same manufacturer does offer an induction-compatible line. Replacing them all wouldn't be cheap, but certainly justifiable if I'm already buying a house and/or new stove.
I have a few Scanpans. They work on my stove just fine.
I wouldn't say so. I still use some of my old pans. Lots of new pots and pans even in cheap stores have the induction symbol on them.