To get them to play on your standard CD player, burn them onto a CDR as music tracks (not files) using Media Player, or Nero, or something similar.
If your CD player wont play CDRs (although most do) then you're stuffed!
If you make an mp3 disc your CD player must be compatible. If you look in something like the Argos catalogue they start from roughly �150 and have an MP3 category stamp next to them. As you'll see some do, some don't.