-Rent is 2.6k annually
-Bills £500 annually
-Food £20-25 weekly
-Transport £300 annually
-Toiletries £5 a month
They're the absolutely necessary expenses.
On top of that I probably spend on average around £20 a week on non essentials.
I don't go out very much any more, but it can be done cheaply if you're willing to pre-drink and not go to clubs where you have to pay entry or where the drinks are really expensive. Usually if I go out I won't spend more than £15-20, and that is without pre drinks. If I pre drink I might not spend any money at all when out except on transport.
Completely depends on you and your area whether taking a car is worth it. If you're going to live in a big city with good transport links it'll probably be a complete waste of money to take it. You also need to think about where you can park it, and whether it's going to be pricey to do so.