I can't download an app if I don't put a card?
This still isn’t working I don’t even know what is trying to take money I can’t download anything
I don’t have a card to put on there, what am I supposed to do?
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Realize that all we know is what you write and you haven't provided any context. If you see an error messages it is always a good idea to include it with any new topic you make here.
How App Store and iTunes Store purchases are billed - Apple Support - https://support.apple.com/HT201359
"If a purchase fails to charge to all of the payment methods that you have on file, a negative balance is applied to your Apple ID. You won't be able to make any new purchases or update your apps until you update your payment methods. After you update your payment methods, the negative balance charges immediately to your updated primary payment method."