We live in London and don't have a car so no petrol, parking, tax, congestion/ULEZ or car running costs. DH walks to work, it's a 25 min walk away. DC1 walks/scoots to school 5 min walk away. I have a disabled person's Freedom Pass so I can travel anywhere within London at zero cost, I make about 3 trips during the week with DC2 for toddler activities and classes. DCs travel free within London as they are under 11. So all of that travel costs nothing (apart from wear on shoes and food we eat to fuel our walks?)
DH has to pay for travelling around London for trips out at weekends (we have trips out most weekends). We all pay for leisure travel by train outside of London a few times a year, flights abroad for holidays and travel when abroad.