Sedan Corolla or Honda Civic 2000+ model car with driver is available Rs. 2000 ~ 3000 per day plus fuel. Food to driver is optional. I suggest do not rent a car without driver, we have no traffic law, so there is no insurance coverage, you may end up victimised in case of car break down. with driver, you will (can) be at peace for parking, snatching, accidents, & break downs will get you a 2nd car without delay.
if you know Karachi - The Anarkali market near Paposh Nagar is largest rental Car spot and bargain deals are available between 7.30 am to 5.30 pm, all pashtuns upright transport guys. I utilise car rental service from that area since 21 years.
The CHOR rentals are situated under liaquatabad bridge at al-karam square and they are saraiki belt gangesters, walk walk & walk instead of getting a rental car from that area.