It depends on several factors. Say, you put down $2500 and finance $6000 for 60 months. Depending on the interest rate you could get from the bank (e.g., 4.99%, 6.99%, etc..) your payment would be between $120 and $150, roughly. You'd have to work out exact numbers with the bank. You can also estimate payments using auto loan calculator from www.bankrate.com
, for example.
In regards to the insurance company, you'd need to shop around. I found that AAA and Progressive are on the expensive side compared to Esurance or Geico. Typically, the younger you are, the higher is the insurance premium, plus it also depends on the type of car. Mustangs are considered sports cars and are more expensive to insure.