Plz help me

[Mekala]

I m trying to modeling cars and tracks in Autodesk 3ds Max.
I have a lot of problems.

1)In wiki ,it is said

Create Models
You will need to create 3D models using Blender for the car's body, the glass pieces, and the wheels. Each different model must be a separate Blender object and each must have a separate texture. Models must be entirely made of triangles
Do i want to create separate three 3ds max files for the car's body, the glass pieces, and the wheels?

Could anybody please explain me this regarding to Autodesk 3ds Max ?

2) what is the file size of a car model and track ?