Disable pad click
Solution 1:
Isn't this doing what you want?
This is in System / Preferences / Mouse.
Solution 2:
You can install touchpad-indicator to enable/disable the touchpad.
sudo add-apt-repository ppa:lorenzo-carbonell/atareao
sudo apt-get update
sudo apt-get install touchpad-indicator
After installation you can find it under Applications → Accessories → Touchpad Indicator.
Creating shortcut:
You can also create a shortcut for disabling/enabling the touchpad.
Note:
- Have a look at Automatically Disable TouchPad While Typing.