Turbojackie,
When it comes to road bikes, expect to spend anywhere from ~$800 for an entry-level bike to...well, the sky's the limit. I'm looking to spend anywhere between ~$2000 for a top-notch aluminum with 105 to ~$4000 (Ultegra-equipped carbon).

I don't know about spinning bikes (though a lot of them seem to use an SPD-type system), but the "clipless" part refers to the lack of a toe clip/cage.