Let's go back to the reason you posted this thread. You want excuses to give your parents to convince them to buy you a car. So far, everything you suggested that you're going to say is a lie. You don't care about the convenience. You don't care about having more time to do school work and you couldn't care less about getting a job.
Admit it. The only reason to get this car is so you can race that pompous GTi douche. While you may not beat him in the first race you will learn that you lack discipline in your driving abilities and will thus take it upon yourself to meet with Vin Diesel and convince him to teach you the ways of the street racing scene. Months will pass and, while at first Vin had little faith in your skills, he soon realizes that after you nearly beat his best time challenging Blood Run Pass that it seems you really do have what it takes. Maybe you will usurp his crown as Road King.
Finally, the day has come that you challenge GTi douche. His ego is miles wide since he beat you the first time and you will face much ridicule from him and his friends. The girl on his arm suppresses a giggle. You stand smug in your stance and wait until the laughter dies down. "Why don't you put your money where your mouth is?" you exclaim.
"What did you have in mind," he replies, "cause if you're thinking about racing again..well, I just don't know if I can stand to see a 16 year old boy cry..haha!"
"Pinks...," you say and his laughter is cut short. "The winner gets the other guy's car. The loser walks away..no complaints, no rematches, nothing!"
GTi douche answers, "Fine! I guess my grandma could use a new car anyway."
[time elapses] Freestyler has won an amazing race...
The crowd is jeering showing off an energy that rumbles through the streets. Your buddies run up to you and pat you on the back, laughing and telling you how awesome that win was. Vin Diesel shakes your hand. "It looks like the streets of Buffalo has its new king" he tells you. "My work here's done" are his parting words and he leaves; likely to discover new adventures in other cities far away. You're blissfully happy.
GTi douche throws you the keys to his whip, saying nothing and promptly gets into his friend Mitch's Integra. "Hey babe! Get in the car!" he says to Selina. She looks at him and despite his persistent calls to her she walks away from him in your direction. The crowd parts and you settle down from the excitement to see this gorgeous girl walking over to you- eyes locked on yours. She tells you that she always loved you and knew you had it in you to beat GTi fag who she, up until that point, was dating and hadn't really given you much attention until this moment. Then, you'll all hop into your tricked out cars and drive off into the sunset thus concluding the end of "The Fast and the Furious: Buffalo Drift".