Ah! Interior decoration... Love it. Not so keen on soft furnishings, but in general it's pretty unbeatable.
There's a hell of a lot of factors in getting a room to look great - The way it faces, where it is, what kind of light you get and all that (For instance, you're on a hiding to nothing if you're trying to Victorianify a modern loft conversion, Velux windows just cut through the mood like a corn thresher through puppies).
First, what's the rough age of your house? Britian is covered in interwar dwellings that, while not massive, can be made quite lovely with a spot of care and compassion.
Do you have high ceilings? It's a pretty important point this - Interwar and after houses are cursed with low ceilings - There's not a day goes past I don't curse this in my current abode with it's damnable not-chandelier-friendly ceilings.
Colour pallete - You seem to have that sorted nicely, a dark wood and green (I'd suggest using two tones of green, a light and dark for different parts), top this off with a few heavy gilt objects and you'll be doing nicely. That said, however, there is always the risk with the darkbrown-green-gold colour scheme that you get it slightly wrong and end up with a bedroom that makes you think of Mint Chocolate.
Dado rails - Perfect for the dining room if you use those chairs, possibly acceptable in some halways. But these things have been creeping out of their place and around houses for years. Don't let it happen here. Just don't.
Lighting! The most important thing ever in decoration - A room with out light is, well, a broken ankle waiting to happen.
Lighting is the key to a room, it's also the think I obsess the most over - A few well thought out and well placed lights can utterly transform a room in a split second - If I hear about a single pendant lamp being used to light a room for most things, then it's all I can do not to call up the deathsquads for some taste-butchery.
Oh.. Find your local architectural reclamation yard, they're all over the country and will provide a wealth of inspiration
Lassco (
http://www.lassco.co.uk/) if you're anywhere near them, is worth a day trip. Infact it's worth a trip for anyone - It's amazing!
There are hundreds of yards like them all over the country, find your nearest and go - you'll be inspired.