By the way, the touchpad package name ends in "synaptics" while the packet manager name lacks the trailing "s".
A good starter for configuration is the file /usr/share/doc/xserver-xorg-input-synaptics/README.Debian (as for many packages is /usr/share/doc/<package_name>/README.Debian) On the web it is documented how to disable the touchpad automatically when typing (e.g. https://wiki.archlinux.org/index.php/Touchpad_Synaptics ). Regards, Jörg-Volker.