Cannot use app store

You need another trusted device or telephone number.

See Two-factor authentication for Apple ID - Apple Support:

A trusted device is an iPhone, iPad, or iPod touch with iOS 9 and later, or a Mac with OS X El Capitan and later that you've already signed in to using two-factor authentication.

Get a verification code and sign in with two-factor authentication - Apple Support

If you can't sign in with two-step verification using your Apple ID - Apple Support

Apple ID - Password/Security Questions verification e-mail not received

To purchase items at the App Store, you will need to use your Apple ID. See this read: https://support.apple.com/en-us/HT204266 Notice that the Create an Apple ID link in the read does not work. You may need to see what Kappy said above unless you already have an Apple ID, etc..

Please translate the error message to English and post it in a reply.