iPhone 6 is disabled and I can’t connect it to iTunes

The support article about the restore screen contains the instructions you need to reset the device in this situation: If the Restore screen appears on your iPhone, iPad, or iPod touch - Apple Support

Also:

- What to do if you get a restore error when you try to update or restore; click here --> iOS update and restore errors - Apple Support

- If you don't see a restore error, but still see the Connect to iTunes screen, or If you can't force a restart because one of your buttons is broken or stuck, contact Apple Support; click here --> https://getsupport.apple.com/?caller=kbase&SG=SG003&category_id=SC0091&symptom_id=20276

If your computer doesn't recognize your iPhone, iPad, or iPod, click here --> If your computer doesn't recognize your iPhone or iPad - Apple Support

Read the support articles:

Set up your iPhone --> Set up your iPhone or iPad - Apple Support

Set up iPhone --> Set up iPhone - Official Apple Support

please activate my i phone 6