Hi Miranda
The style of lighting you are trying to emulate uses a lot of lights, but the basics are as per Eddies excellent post on a lighting set up. I think Dave Hill uses the basics, then adds lots of accent lights to increase the contrast ratio and add drama to the image.  The accent lights are very directional so only lighting the selected part of the scene which the photographer chooses.  With this in mind your first two images are closest .
In the newer postings, with your lights, the first image has the contrast ratio, but not the general lighting, the second is mid way and the third a lower contrast with more even light.  Watch out for light areas closer to the camera than the subjects face - illustrated in the third image where the hand is better lit than the subjects face. This will occur because light loses its strength very rapidly the further it travels.  Something only slightly closer to the camera , but in the same light, will appear twice as bright as something slightly further away from the lens.   
The best way to learn is to master the basics, and then lots of experimenting and being critical of the results you get.
To reinforce what Eddie has already said on a basic lighting set up here is a link to illustrate the technique in graphical terms what has been said in words above.
http://www.mediacollege.com/lighting/

hth
Richard

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html