The traditional PBT listening section is designed to test your ability to understand spoken English in a North American academic context. It consists of divided into three parts:

Keep a printed answer sheet (bubble sheet) next to you to practice the physical act of marking answers.

The Educational Testing Service (ETS) is the creator of the TOEFL. While they push iBT now, they still offer the TOEFL PBT Practice Tests, Volume 1 and Volume 2 . These come with audio CDs. While not "free," these are the only 100% authentic downloads.