"My car is pretty."
Translation:Mi carro es bonito.
It's a description of something = ser. Google Doctor vs Place for how to use ser vs estar.
There are multiple Spanish words for 'car' Carro is just one of them. There is also 'auto' prounounced like 'out-oh' if that makes sense.
Oh and coche although that directly translates to cart. As in horse and cart.
the adjective needs to agree with the noun that is either masculine or feminine. Therefore, bonito would describe el carro, while bonita could be used for mi esposa.
carro ends with a "o" witch means it is masculine, so you would say "bonito", you use it with like "ella es bonita"