Question [Q] Rooted update

Hi,

I have a S4 i9505, with Kingo Android ROOT.
I can't install CWM with Kingo, so I want CF Auto Root.
I also want KitKat 4.4.2 when available in my country.

1. Will I lose my data when un-rooting Kingo?
2. Will I lose my data when updating to 4.4.2 (via Kies if safe, or via Odin)?
3. Is it possible to unroot from Kingo and install other root (CF).
4. Do I have big chances to brick my phone with what I want?