In the morning, fill the radiator with water and remove its cap (lid).
Start the car for couple of min.
And then observe if air bubbles are coming at the radiator cap?
If yes, then your head gasket is gone and it need to be change.
Changing head gasket is rather easy job than engine over hauling.
Where do you live in Lahore. I know one good guy in Model town and can guide you to go there for free check up.