Yes, you can pull a car with a come along. A come along is a hand operated winch that uses gears and pulleys to generate mechanical advantage. This means that you can use it to apply large amounts of force to an object, making it ideal for pulling cars.
To use a come along to pull a car, first attach one end of the come along to the car's frame. Then, take the other end and wrap it around a sturdy object such as a tree or pole. Make sure that the come along is securely attached before you start cranking the handle. As you turn the handle, the gears will engage and begin pulling the car towards the object that you've wrapped it around.
Keep cranking until the car is pulled free from whatever was blocking it. Once the car is free, disconnect the come along and drive away!