yaris 2012 basic or serious issues?

[AumesiAdA]

Good day everyone!
I just have a few questions about my .
Ive been using this car for only almost 5months.
i just bought it second hand.

1 - the smell from outside goes inside the car (smoke from other vehicle, garbage from outside, smell of burned objects from outside) WHY?

2 - how much is the price for full body paint here in riyadh?

3 - when the climate is too hot, around 35 to 40 deg.C, and im driving inside the city for around 2 hours coz i need to go there, i need to go here, the engine becomes weak. i mean it takes 2 to 3 push on the gas before it starts to rev. is it because of hot weather?

Please i need advice guys.
Thanks a lot