As Sircharles and Nilla have said mate...UV layout first....then go from there. I agree with Nilla...this is not going to be easy, there is a fair amount of detail and work to be put into this to get the same effect. Photoshop is also an option...either way it will be a lot of work but it will be worth it.
As Nilla has pointed out...you need good lighting to give the correct feel and get the most out of it when you are done...
We are all here to help mate...just have a go...thats the fun part..if you get stuck just post and somebody will help you through. This will look really good with a good texture job and good lighting!
PS have a look at honestdoms and daves jerry cans in the jerry can challenge to get the idea.
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes