What is the literal cheapest first car to get?

I mean this as in total cost - insurance, cost of the car, and road tax. The reason why I ask is because I know that i would like to get a car after I pass my test, but as I will likely have to save up a bit in order to afford it, I would like to know what the literal cheapest option is. It needs to be ULEZ compliant though, as i live close to central london, and preferably it would be manual as well - purely because I don't feel comfortable driving a manual. So far, my cheapest option I've found is a nissan cube at 1.7k insurance and 2k cost - but i want to know if there are any other options that are or could be even cheaper