Do I need life insurance?

Generally, if there are others that are financially dependent on you, then the answer is yes.
If you are married and/or have children, the insurance will help replace your lost income. It will also help prevent your family from selling assets to pay the bills. How much life insurance is dependent on many factors:
Your current income, your current mortgage and credit card bills, and your current and future educational needs.
Speak to your local CPA about your life insurance questions.