G'Day Divermike, we have had about four batches of chooks over the last 12 years or so. We're in Oz, but I guess there is not a lot of difference ( apart from snow ). In a nutshell you need a coop with a horizontal pole for them to perch on, one to two nest boxes per 4 birds, food and water supply, an attached fenced on all sides area, where they can scratch around during the day and ideally a concrete floor on the coop. I put a drain hole in the concrete floor to make it easy to hose out, I also put mesh over this to keep vermin out. Ideally the whole coop should be vermin proof. I'm not sure what sort of predators you have over there but the outside area really needs to be fenced on all sides, as some animals can dig underneath and some can climb over. It can be great if you can let them out during the day to scratch around your garden, they will eat weed seeds and bugs and turn the soil over, but, they will also eat seedlings and some other plants. Not sure what breeds you have over there but cross breeds are usually better layers and they can be feed on commercially available feeds or on kitchen scraps with some supplements. Also try to get birds that are breed humanely, we once got birds that must have crammed together in cages, as they had their beaks trimmed to stop them pecking each other and it took them 2 months to work out what the perch was for. Lastly try to get birds at an age called point of lay they are a little dearer but it saves you waiting many weeks if you buy young chicks.
Hope this helps
Ian