I have just gotten Blender 3D, and was wondering how to create a wireframe. Could someone please guide me on how to do this?
This depends on which Render Engine you are using.
For more realistic Results you should select
Cycles, but in this case
Blender Render should work just fine.
Set up your scene (Camera, Lamp, Object), select your Object and choose
Wirein the Material Menu on the right.
In Cycles this is a bit more complicated, but here is a template: BlendSwap
Here are some really great tutorials you can look into if you are having trouble: Blender Cookie
Since blender 2.70, there is a wireframe modifier which you can use to easily create wireframe models.
You can just go to the modifiers panel and select 'Wireframe', that will already achieve the effect shown above. However, you can make it look even better by fiddling around with the options.