Used Ford Focus for Sale in Murfreesboro, TN

This car is cheap and made of plastic. I do a lot of DIY repairs and upkeep when I have to, and I have seen things on this car that I have not seen on others. I needed to clean my throttle body at one point. When I removed the air hose connecting to the throttle body, I noticed that the actual throttle body was made of plastic and not metal, very cheap. There is no radiator cap. You must refill the coolant through the reservoir, which makes it harder to get air bubbles out. A lot of the screws holding the interior panels in are made of plastic. Am I supposed to use my plastic screwdriver to remove these so I don't strip them?? Other than the cheap build of the car, it gets okay gas, about 20mpg and has lasted almost 200K miles.