Just use Audacity. Borrow someone elses or use your own deck, connect with RCA/mini-jack. Do a test recording until you're satisfied. Remember, for the test recording you need to look up the loudest bit of a song and record that so the VU (signal) meter in Audacity jumps just below 0dB. NOT past it.
Then without changing settings, record a song, save as mp3 and record the next song etc.