Yes, jeans or corduroys would be suitable for this weather. A long sleeve shirt would also be nice but you don't necessarily need to wear a light coat unless you are susceptible to being cold often.
Something very warm. 15 degree weather is very cold and very dangerous. I would suggest long sleeve shirt underneath of a wool sweater or a hoodie. I would also suggest a coat lined with feathers in...
You should. Wear a nice pair of uggs , leggings ans a thigh long shirt ! And maybe a jacket if nessesary. Also can wear some nice jeans w' a nice t-shirt and a cool jean jacket, w' flats it would be...