I lived through some seriously cold sub-zero freezing winters and trust me Helen, it's all about layering and keeping your extremities covered - hat, gloves, two pairs of socks (or thick wooly ones), scarf and then start layering from the bottom up - thermal long johns, singlet, long sleeve thermal top or t-shirt etc.
Snow is a bit different from rain and you'll get away with something that you can just dust the snow off. But if it does rain or worse, sleet, you'll get wet if you're not waterproofed - but even one of those el-cheapo $2 plastic rain ponchos from the Reject Shop over your jacket should help keep the wet out.
Shoes are important, too - you'll want a pair that has some grip because ice is dangerous and often undetectable. I remember being excited to wake up to a beautiful while winter morning only to be seriously annoyed an hour or so later on my way to walk and slipped for the 4th time in about 50 metres! Be careful. One of my friends broke her wrist because of 'black ice'
What sort of winter gear do you already have? You might be able to make do with what you've got and some creative thinking. You'll probably find you spend lots of time by the fire sipping a skinny hot chockie while looking at the beautiful scenery through double-glazed windows
Just keep moving! And don't be lazy...
SW: 74.3kg - 1/1/09
CW: 71.1kg - 3/5/09