If I understand your question right, you want how much the entire loan will cost you?
Assuming your total purchase price is 13,567 and you have a downpayment of 5,000, at a 6.75 interest rate and a 60 month loan (term makes a difference in this, shorter is higher payment, lower total interest paid).
Purchase price: 13,567
Downpayment: 5,000
= Loan amount: 8,567
Total interest: ~1,551
Total payment: purchase price + interest paid = 15,118.
If you have different terms, or if I misunderstood your question (happens, mea culpa), you can play with the numbers with an online calculator; personally I simply use one of the ones at bankrate here: http://www.bankrate.com/calculators/auto/auto-loan-calculator.aspx
