To boot Kali in console mode is a pretty common practice. Since Kali has updated to 2.0/Rolling, the normal method of using chkconfig to disable the display manager no longer works. I am not sure why it doesn’t work, but it doesn’t. They also use LightDM instead of GDM3.
To get Kali 2.0 / Rolling to boot into console (useful on ARM hardware such as Raspberry Pi/2/3), run the following commands:
root@kali:~# systemctl get-default
root@kali:~# systemctl set-default multi-user.target
Once you reboot, you will be at the familiar console login screen. To revert these changes, all one has to do is run:
root@kali:~# systemctl set-default graphical.target
Once you reboot, you should be back to the GUI login screen.