What can I do to update and download apps?

If you refer to -> Related Article -> If a message says 'Your account has been disabled in the App Store and iTunes', you need to  contact Apple Support for help.

I can’t update nothing or update nothing

See -> If you can't make purchases or update apps, including free apps, you need to update your payment method or add a new one. 

See also -> Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

Check also -> Require a password for App Store and iTunes purchases

Require a password for App Store and iTunes purchases - Apple Support