I’ve signed up to CG Cookie. It has plenty of video tutorials that will hopefully help me learn to use Blender. To start with I’ve chosen to work through a course called An Introduction to Hard Surface Modelling in Blender. Sounds like a good place to start.
I’ve also played around with the Cycles Rendering. I’ve not mastered it yet by any means but I have managed to make some pictures of my train that look a bit better than the screenshot.