some questions zte nubia z5s topic

Hi
I'm new at this so I have some questions
1) is there a device root If so how and where the download
2)Is it possible to download version Kitkt(4.4) without updating system updates?
3)I download Google camps through wifi Write me an error 911 How do I fix this?
4)I reduce the display appears to me " discontinued operation" How do I fix this?

thanks