Why is iPhone 6 disabled after screen replacement?

I got this phone today and the screen already pop up and not turn on. I replaced it, turned it on and only found "iPhone is disabled, connect to iTunes". I connected it to iTunes and it said: you need to input password.

The problem is that there is no regular page to allow me to input password, though I do know the correct password.

Try restart again and agian. The same thing. I can't restore the phone coz too many pictures I need.

Really need help.