stop looking at root toolkits. they make it sound like they make
e it easier, but many times its not the case.
the right way to root a nexus, any nexus. its easy. in a nutshell..
1. connect your device to fastboot and type.. fastboot oem unlock
thatll unlock your bootloader.
2. now with fastboot, flash a custom recovery.. fastboot flash recovery recoveryname.img
3. now using your new custom recovery, flash the latest SuperSU and reboot.