Ha, I wasn't speaking directly in your direction.
Generally, I would have to assume you aren't taking buses to work and already had a cell phone. If you don't have those then those are definitely things that you would need.
Like I said, it's yours to do with.
I suggest you do it wiser than that though.
I strongly suggest you don't buy a car, but rather finance or lease one. The interest paid on those are tax deductible. If you go and flat out buy one then the only write off you will get is its depreciated value over the next several years. To go throw down 5K on a car won't hold any value to the IRS next year unless you can put it down as a business expense (own a corp, etc.) or if you have someone that can wash it as something else (which is illegal, but you get the full tax deduct none the less).
This tax refund is also considered income and is taxed.
So yes, there are other ways to slice the pie.
"I'm going to go buy a car with my tax refund" isn't the best road to go down.
Then again, do what you want.
Just lending advice...