I’m new to blender, still working my way through a lot of tutorials. I don’t even know HOW to import a model right now. I have a model of a car, and I want to see how it looks on my landscapes. I just don’t know how to get the two objects from separate files together.

How is this done?

PatchMac: see user manual, Appending and Linking

File/Import will let you import non-BLEND files. (ie OBJ, 3DS, LWO, FBX etc…)
Use File/Append if your model is already inside a .BLEND file.