Is the chassis of this car seriously rusted? Should I consider getting an undercarriage paint job?

I'm considering getting a Renault Koleos. How is this car?

What should I do if there's rust inside the wheel?

Just graduated from university and haven't found a job yet. What should I do to be able to afford a McLaren within 10 years?

I'm considering getting a Model S. Should I go for the dual motor version or the tri-motor version? Thanks!

What should I do if the sunroof of my 2011 Nissan Sunny is rusted? I bought a second-hand car. Does it need repair?

Will there be a color difference if I get the grapefruit gray touch-up paint done outside? Do 4S shops have the original paint?

Is it easy to clean the leather seats of the Macan? Should I get covers for a new car?

I bought my Jetour car just a year ago and it's rusting everywhere. Both welded and non-welded areas are rusting, and it seems to be rusting from the inside out. It's something I can't handle on my own, so everyone, please take note.

Which car should I consider switching to in the future?

Is the chassis of this car seriously rusted? Should I consider getting an undercarriage paint job?