MacBookPro 2011 GPU failure. Csrutil command will not work at all
Just incase anyone had this same issue.

I had to use a new external HD (backed up everything onto it) and booted with that using option button.

Then erased the internal disk using disk utility and it then allowed me to do a fresh MacOS which then updated the recover software to 10.12.6 Sierra. 

Which then therefore allowed me to disable csrutil in Recovery mode.