In the sentence "Ella trabaja para Toyota," the appropriate preposition to use is "para."
How to get the word
The complete sentence is: "Ella trabaja para Toyota."
The preposition "para" in Spanish is used to indicate the recipient of an action or to express a destination, purpose, or the person or entity for whom something is done. In this case, it indicates that she works "for" Toyota.
Understanding the nuances between "por" and "para" helps in using the correct preposition depending on the context in Spanish.