MacBookPro 2011 GPU failure. Csrutil command will not work at all
Solution 1:
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.