In depth information 3D files
3D is a broad subject, and a typical finished composition will be composed of several - perhaps dozens - of hours of work in an array of skills.
Modeling is the act of creating a 3D mesh, whether the end result is a bug-eyed alien or a teacup.
Animation is the process of taking a 3D object and getting it to move.
Texturing. Without some kind of texture art, everything will be variations of solid colors. The most common and accurate way to create a texture for a model is to "unwrap" the mesh (flatten it out) and paint over it in an application such as Photoshop.
Rendering an image is typically the last step, and is perhaps the most important part. It's often overlooked by beginners.