Top Half
Singlet/t-shirt, Long sleeve thermal top, Polar fleece jumper, Woolly jumper
all topped off with a Fleece lined hooded jacket.
Added extras..... a fleece neck muffler, fleece lined wool beanie with ear flaps and fleece lined woolen fingerless gloves with flip over mittens. (I don't know if I've mentioned this, but fleece is very warm and cosy

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Bottom Half
Water/wind proof Snow pants as an outer. They're great, they have velcro tabs on the waist band so they are expandable if you need to add more layers underneath. And I do....
Home made polar fleece long johns cut extra long and extra high to keep ankles and lower back warm.
On my feet I wear my Aldi snow boots. Insulated soles and lined with fleece.
2 pairs of socks... Cotton followed by thicker hiking socks.
Don't wait till you're freezing cold before rugging up. It'll take ages for you to thaw out.