In order to switch on the Tivoli's aircon, you will need to:
Turn the biggest knob that has the words AUTO and A/C on it to switch it on
Alternatively, you can just press the AUTO button on the knob
To adjust the fan speed of the aircon, you can turn the knob left or right to get your desired wind speed
To adjust the temperature of the aircon, there will be a button on the left that says TEMP. The up arrow increases the temperature and the down arrow decreases the temperature.
Do also make sure that the Internal Air Circulation button of the car is turned on — this button is located above the DUAL button.