I know just running will not make me lose weight, but what else will i need to do?

Need to watch what: you eat. Calories burned must be > calories consumed. You can mix & match different kinds of exercise. This site helps determine calories burned for > 100 activities: http://www.prohealth.com/weightloss/tools/exercise/calculator1_2.cfm

Eat less.: Running burns about 600 calories per hour. If you eat less you don't have to run as much. There are about 3600 calories per lb of fat so you can work the math any way you want. Success is usually found in a combination of exercise and diet.