I'm not sure if you already bought the car, or are still researching the car... but for under 10k i'd definitely recommend a Lexus IS300 (2001 and up) I believe they're called Toyota Altezza's in Pakistan...
AWESOME CAR, toyota supra 2jzge motor, very solid,reliable, and great looking.
a good place to look for used cars to buy is craigslist.com click boca raton, FL to find local sellers
Aside from that, if you're going to spend 10k on a car it is a good investment to pay a mechanic to do a thorough checkup of the car, which usually runs you $50-100 but you have piece of mind.
Again that is completely up to if you aren't as mechanically inclined as some of us I would definitely leave it up to a professional.
What ever car you end up getting (or already got) Inshallah may it be a great car for you and give you no trouble.