Boyfriend bought a car but it has scratches and a dent on it?

My boyfriend's car was in pretty bad shape, so he recently decided to look for a new one. Him and I went to a Honda dealership and he found one that was in his price range that he really liked but it was getting dark out because we had went to a couple dealerships previously and by the time we got to the Honda one, the sun had already set basically. He took it for a test drive, really liked the car so long story short, that was the one he bought. Now fast forward to the next day, he brings home the car and I went out to see it and on the passenger's side, there's a big dent by the door. It's a used car btw so it had a previous owner. The car is black and like I said it was dark out when we looked at it (big mistake, will no longer go look at cars in the night) so we didn't notice that when at the dealership.
There's also a lot of scratches all over the car, it's like tree branches scraped against the sides (the scratches are on both the passenger and driver's side)
The sales guy didn't say anything about the car having a dent or about the scratches so this was totally unexpected.
Is it too late for my boyfriend to go back to the dealership and say something? Will they fix it?

What will replacing my car with front(only) stiffer sway bars do?

My truck is a 2003 Honda Element awd and Not to long from now, my mechanic told me at some point. That I need new struts and tires. However I'm also planning on replacing the stock front sway bar only, with the same sized but stiffer ones from st suspensions. What difference will repacking the front sway bars make on my trucks handling through curves and corners?

Question about anti roll sway bars?

My car is an 03 Honda Element awd. From my research, the only brand that offers this option for the front anti sway bar is st suspensions. Those sway bars claim to be the same size(in diameter) as the stock ones however they are more rigid.

With my options of only being able to upgrade to a stiffer front sway bar only, what difference in handling would it give my truck through corners/highway curves? I have heavy duty Moog sway bar links installed a long with new oem sway bar bushings and the handling feels pretty stable, stiff and safe at highway speeds. In the aspect of highway handling, I'm able to do 85-90 mph through the same curves that my previous 06 Mazda 3 sedan was able to do at 110 mph.

If I do all these things including the st front sway bar upgrade, how much faster will I be able to go through that same curve in comparison to my Mazda 3?

Will my truck be able to keep up with my old Mazda 3 then? I'm comparing my truck to the Mazda bc they are BOTH 4 cylinders, with similar hp output, fwd and they are both compact vehicles(which are know for having a strong point in handlimg).

What tires will give me an improvement over the ones I have now(picture shown)?

I have a 2003 Honda Element awd and I want to improve the handling/stability at higher highway speeds through curves and corners. However, they have to be all season tires.
My car can do 85-90 mph through most highway curves. I want good safe/grippy tires that will help me take that at 95-100 mph. What tires would be good without compromising all season tires? What tires will give me an improvement over the ones I have now picture shown

What tires will improve my truck handling through highway curves and handling?

I have a 2003
Honda Element awd. My mechanic recently told me that I have have little tread left on my tires and that the best action before is to replace my tires before winter. This time I have the opportunity to possibly find myself a good set of tires if any

Anyways, I'm running stock sized Yokohama geolander by/s tires. Like I said my goal in repacking these tires is to get tires that have all season capabilities esp in rain and snow along with a ride that is smoother(non unbearable noise). That's just one of the traits I'm prioritizing but I also what good tires that will make my truck handle better through highway curves, corners and overall I want tires that will give me better handling/stability an higher highway speeds?

Based on the current stock sized tires I have, is there any other tire brand that is better than what I have and that will give what I'm looking for(from what I stated
Above)? What tires will improve my truck handling through highway curves and handling