I tried several times pulling out the key and it will not budge

I found a spare key for my fathers car opened the door and put my key in the ignition to start the car. Once i turned the key in the ignition to have the car start nothing at all happened not even the lights on the dashboard. Afterwards i tried several times pulling out the key and it will not budge one bit. I would like to know what is the reason for this? Could it be because of a battery that needs a boost or ect? Please any information will help, i would like to fix my problem before my dad gets back.