Hm well a coat def lol, maybe a few haha
Jeans
boots
leggings
long sleeved dresses
jackets / cardis
Shirts / tops (long and short sleeved)
I would stick with black, grey and brown for coats and jackets (so they go with everything) and get some colour into the outfit with some shirts / tops and maybe printed dresses.
Im in Aus so im not sure if my suggestions would suit summer and winter. When i was in the UK, was ur autumn / winter and i wore alot of jeans, printed tops and jackets x