Should I buy this car? if not, what model of jeep should I get?

I am buying my first car, I am pretty dead set on getting a jeep but I am looking at a 2018 Jeep Renegade with about 160k miles on it. I asked the dealer for photos of the underside and looked like it had a bit of rust. If it's rust, how easily can it be treated? My brother is a mechanic that is mostly familiar with Chrysler products, but I don't really want to drive the hour and a half to this dealership when I can tell right off the bat rust will be a problem. If not, what other types of jeeps would be okay for a first car? My budget is 8k but id probably like to stay on the lower end of 6/7 grand.

Here's the carfax report & listing if anyone wanted to take a look aswell (:

Carfax Report
Listing!