If I upgrade operating system in September 2019 and lose iTunes, do I have to pay a monthly fee just to access and listen to music that I have already purchased from the Apple Store?
No, you will still be able to listen to your purchases, but in the new Music app instead of iTunes. See : About the upcoming changes with iTunes on Mac - Apple Support
No, you will still be able to listen to your purchases, but in the new Music app instead of iTunes. See : About the upcoming changes with iTunes on Mac - Apple Support
Do I have to pay a monthly fee just to access and listen to music that I have already purchased from the Apple Store?
