As for hands, I am rarely out for more than 40 mins in cold rain, 5c etc, but when its very cold I wear thin polypro glove liners under old fleece gloves, and when closer to freezing I put over these a pair of goretex overmitts (they are just a shell, no insulation. This works well for both cold and rain.
I suggest looking into the commuting section or winter riding for other waterproof, breathable gloves, as there must be good ones out there.