Its going to be subjective and depend on your lifestyle really but,
For winter: 2 thick cardigans, 3 jumpers, 3x jeans, about 8 long sleeve tshirts, 2 pinafore dresses, 3 mini skirts, 2 long sleeve dresses and a lot of black leggings to go with the dresses and skirts. I also have some outdoor fleeces and a couple of pairs of thick cotton jogging bottoms.
For summer: 3 lightweight cardigans, 4 summer dresses, about 10 strappy/ tank tops, 3 short sleeve tshirts and 2 long skirts. I mix and match with my winter clothes depending on the weather.
Coats wise, I have: one winter thick waterproof, one summer thin waterproof, and one lightweight padded jacket.
I have a couple of necklaces and accessories but don't really wear them unless it's a special occasion. I also have two special occasion dresses- one for weddings, one for parties, and a wrap thingy.
This fits my lifestyle as a SAHM whose hobbies are art, PC gaming and reading, and who doesn't have any real need to dress smartly beyond looking neat and tidy. If you have a different lifestyle your needs will be far different to mine!