My school requires me to take 4 alevels which should I take to become a neuropsychologist paychologist
You shouldn't really be thinking too much about a post-university career just yet. If you want to be a neuropsychologist then your first goal is to get onto a BPS-accredited Psychology degree. Most universities do not require specific subjects for psychology, but doing at least 2 subjects from biology, chemistry, mathematics, physics and psychology would be sensible.