Re: "iTunes music account" "What happened to the money that was in my itunes account?"
iTunes is now part of the Apple Music app:
Your Apple Account is the account you use to access Apple services like the App Store, Apple Music, iCloud, iMessage, FaceTime, and more. It includes the email address and password you use to sign in as well as the contact, payment, and security details you use across Apple services.
You may want to check whether you have an Apple Account Balance:
Check your Apple Account balance - Apple Support
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Info. if needed: Apple Music can be used with or without an Apple Music Subscription.
See how to: Get music on iPad - Apple Support
Eg: says:
"Buy music from the iTunes Store
If you don’t subscribe to Apple Music and you want to add your favorite songs or albums, you can buy and download music from the iTunes Store. And, if you previously purchased items from the iTunes Store, you can download them to your authorized computers and devices (up to 10 total)".