Arcade Vehicle Physics is mobile friendly very easy to use Tool. It has a quick setup tool in which you just give references to vehicle body and wheels and click 2 buttons and your vehicle is ready.
For better vehicle handling and more features check out Ash Vehicle Physics.
This asset is very easy to use. It has the basic movement logic. This asset will be helpful for you if you are working on a arcade vehicle based game like car fight, car shooting, or simple racing with collectables and throwables, You can use this movement logic and add other functionalities according to your project need.
You have to download "4 Toon City Cars" pack mentioned under package dependencies section.
The code is very well written and documented so its a great learning resource for beginners. And also very easy to modify as your project need.