My first robot

I am absolute beginner in robotics and I want make my own robot. 

I found this chassis: https://www.robotshop.com/eu/en/2wd-beginner-robot-chassis-v2-red.html#Specifications

I want to programming with ChibiStudio: http://www.chibios.org/dokuwiki/doku.php?id=chibios:product:chibistudio:start

I also want on my robot distance sensor

Which components i have to buy?