You probably have a tape deck. If so, you can buy these adapters at a Radio Shack or the Electronics department in most Wal-Marts or K-marts.
They look like a cassette tape with a cord running out of one end, with a headset jack on the other end. Put the tape in your player and insert the plug into the earphone jack on your iPod and it Play on your stereo. Choose a song on your iPod and the music should play fine!