A VERY SMALL car... like Suzuki Swiftlet or Perodua Kancil. $700 could JUST about cover the monthly instalment... depending on how much downpayment you put down.
But if you throw in stuff like petrol, parking, ERP, maintenance and repair, accidents, insurance, $700 probably will not cover all your car-related expenses.
However, it should cover taxi charges (including call charges) quite comfortably!
You might want to consider purchasing commercial vehicles such as Renault Kangaroo. They're cheaper (to buy and to run) and taxes are lower. However, I do not know if there's any restriction for foreigners.