Difference between Weight and Mass

What is the difference between mass and weight? 

     I think it's something that a lot of people are confused about.  They just think that anything that's big like this car has a lot of weight, is very heavy, it's gotta lot of mass and people just basically 

think of these ideas as all the same.  But there's an important distinction between the terms mass and weight.  

Mass at first is the amount of matter in an object whereas weight is a force. It's the gravitational attraction that the object feels to  towards in this case the Earth's center.

1) Why is it difficult to push my car?

  Most of them answer, the car is heavy and some of them say gravity makes it hard to push.

2) Your car is pulled towards at the center of the Earth, but when you push car you didn't push it up then why it is hard to push?

  Answer for the above two questions, Because the car has inertia.  Inertia means that objects with mass have a tendency to resist changes in their motion. 

  The idea that I'm trying to get is actually is that it's these are actually two different.  One thing is that there's a force pulling a stand into the earth and that's what we call weight

and that makes it impossible to lift but there is something else which is called inertia and  that mean something is difficult to change its motion.        The car got lot of inertia and that's why it's difficult to push which is different than when it's difficult to lift.