This is a comprehensive HOWTO to remove your TTY1-6 (Ctrl+Alt+F1-F6)
In forums been a lot times asked how to remove unneded TTY to save speed and Ram for older comps.
TTY`s are beeing started if theres file in /etc/init/tty[1-6].conf and it contains line start on runlevel  Long method is to make line unexecutable by puting in front of it # #start on runlevel 
- Faster is just Remove 4 virtual TTY terminals using in terminal removing command for desired TTY terminals
sudo rm /etc/init/tty3.conf && sudo rm /etc/init/tty4.conf && sudo rm /etc/init/tty5.conf && sudo rm /etc/init/tty6.conf
- Restart Computer