keep your ankles and wrists warm! matters more than the gloves in cold weather.
Depends on whether you care about looks or not.
Bib tights, and waterproof shorts for when it is wet, decent windproof jersey, long sleeves and decent cuffs. You rarely need a waterproof jacket, in fact you just sweat LOTS!
Wouldn't bother too much with "waterproof" gloves or socks, windproof yes!! waterproof, well they have big holes in so you can put them on, which, particularly for socks, means water will get in.
Ridden to -8C in following last winter if it gives some ideas, Endura thermo bib longs, Assos wind block jacket, Groundeffect merino base layer, Assos Uno shorts. some rose winter socks, Bontrager winter gloves, buff, Northwave boots and overshoes. That was fine. If your night riding be aware you may need to wear more, it may be me but i am always colder on night rides than day rides even if the temp is the same?