Not necessarily. The distance a toy car travels depends on various factors like the force applied, the surface it's moving on, and the friction. A heavier toy car may have more momentum, but a lighter toy car may be able to move faster with less effort.
If there's a slope down the faster one would be the heavy one. On a flat surface with no slope, the light one may start off much quicker; Although, the lighter one has a higher chance of flipping over.
The mass of a toy car will affect its speed. A lighter car will accelerate faster than a heavier car, assuming all other factors (such as the force applied) are constant. However, once in motion, a heavier car may maintain its speed better due to its inertia.
If the toy car's ramp is on 45 degrees and if the toy car is put on some weight, the toy car will go faster because it goes faster, which makes the car go further.
A heavier toy car is better to go down a ramp and make a jump better than a light car because the heavier the toy car is, the faster gravity will force it to roll down the ramp, and with all its speed, be able to make the jump. Of course, you wouldn't want to make the toy car so heavy so that it barely or doesn't move at all. Just like drops of water when it's raining outside and a few drops hit your window. The heavier drops drip off faster than the smaller ones, and that goes the same with cars, too.
because the little toy car doesn't move by its self
An engine;)
yes
Mass (and weight) certainly does have an impact. Other factors that come into play are how much energy the engine exerts (a toy car with an engine that exerts the same amount of energy as a more massive toy car can travel faster on the same surface) and how much friction is generated by the wheels and the surface the toy car is traveling on. If the (toy) car is going down a ramp,if you add say another two or so grams, the car will travel faster
because a toy car has smaller wheels and is remote controlled and a real car has bigger wheels and runs on gas
If the surface material is smoother and slipperier, the toy car will go faster. However, if the surface material is bumpier, then the toy car will not go as far.
Only if it is going downhill.