All I'm gonna say is this: If you are having trouble affording tires, you either need to get a job or find a new one if you already have one yet still can't afford tires. I'm 17 years old and own an 09 STi, all paid by myself from saving up money by roofing every day during the summer for two years. You shouldn't own a wrx if you can't afford to put tires on it, simple as that. That's like having your parents buy you a new set of golf clubs and then asking for a used trash bag to put them in. Prioritize what you buy for your car. I still have stock rims simply because I bought new tires first.
Tldr: If you're spoiled enough to have your parents buy you a WRX, the least you should be able to do is buy your own f'ing tires.