In year 7. My secondary school was only a 10 minute walk away from my dad's house so I just walked. Unless my dad had to work early or it was properly p*ssing it down, then we might have gotten a lift.
My primary school was too far away to walk on my own so young so my mum walked me there and back. It wasn't actually that far and I could walk it now, but not that young on my own.