a good quality cassette walkman or if u already have hifi system that would be enough along with a cable with heasphone jack (male probably 3.5mm at both ends) would be enough.

I used to record using jetaudio which gave pretty good results long time ago. If u need too much high end features (for refining recordings, noise cancellation, editing to great extent professional tools like soundforge etc would be required. Rememer recording from cassetes is gonna be too time consuming and manual task.

Best luck.