category of debt instrument

1. What is the difference between a debt instrument and an equity?
2. Define and briefly explain the following terms:
a. Face value
b. Coupon
c. Coupon rate
d. Current yield e. Maturity
3. Explain in which category of debt instrument the following belong:
a. Car loan
b. U.S. Treasury bond
c. Three-month U.S. Treasury bill
d. Mortgage loan