What do you want to study at Uni - and have you checked the entry requirements on a range of Uni websites for that subject?
Start there. They will clearly state any 'required' or 'preferred' subjects. Unis have to be totally up-front and honest about this - there are no secrets that only 'special people' know. As above, 'facilitating subjects' got dumped years ago - so ignore any teachers or school staff still wittering on about this, and do your own research into what each Uni does actually want.