most of that are broken shaders or broken script files.

be sure to copy and paste all pk3`s from your quakelive folder and recheck your script/texture/maps files etc..

Iirc the grey in the second one is either you need the gibs pack you could grab here http://www.wolfcamql.fr/en/download/category/...ifications

Or

cg_screenDamageAlpha 0
cg_screenDamageAlpha_Self 0
cg_screenDamageAlpha_Team 0

Or if none of that works, r_enablePostProcess 0