Answer:
It suggests that his only wish is to purchase a car.
Step-by-step explanation:
The sentence that includes "coveted" is:
"All I coveted was something on wheels (preferably four of my own which might go or even might not go...."
Based on the sentence we can infer that the author is talking about something he wishes for, so the answer is either "It suggests his wish is excessively strong." or "It suggests that his only wish is to purchase a car."
In the beginning of the sentence, the author says "All I coveted". Based on that we can learn that the author's only wish was a car.
Hope that helps :)