Antonio mira, la policía te puso una multa (fine). marisa y esta vez, ¿por qué? ah, sí, parece que el carro está mal (blank). antonio ¿puedes ayudarme a poner las maletas en el (blank)?

So this conversation is as follows:

Marisa: y esta vez, ¿por qué? ah, sí, parece que el carro está mal estacionado.

So estacionado is an adjective that means parked. So in this context, the car is badly parked and Marisa knows this. That's the reason why Marisa got a parking ticket.

Baúl is a masculine singular noun that translates into trunk and is a large strong box with a lid, used for storing things. Since this is a masculine singular noun, we have used the definite article el here, that matches the masculine singular form. Finally:

Antonio: ¿puedes ayudarme a poner las maletas en el baúl?

this question is given using the conditional form. conditional tenses are is used when talking about hypothetical situations and probabilities. also, this is used when making polite requests. so comprarías is the conjugation of the verb comprar that matches the second person singular in the conditional. finally:

¿cuál comprarías tú?