I didn't have any car parts such as shocks, differential and ESC and I didn't spend so much on that. Then I designed rubber band shocks and surprisedly worked well. It provides adjustability for front and back separately with using different tension rubber band.

You can find the instruction to build in link:
https://www.reddit.com/r/EngineeringNS/comments/j4y7pa/rubber_band_shocks_for_tarmo4/

You need followings;