1) Running or walking about 10 to 20 miles a week. I use my stepper if the weather is really bad, although.
2) Weight lifting. I use hand held weights, because they fit nice and compact in the room (not like a bar with weights). They can be as low as 3 pounds or as high as 50 pounds each or more.
3) In a nutshell, try natural foods. Avoid all processed foods (except once in a while, if it is difficult etc.). Natural foods are like whole grains, fresh vegetables, fruits, meats, milk, eggs, nuts, and seeds etc. Basically, stay away from the foods that have processed sugars, artificial sweetners, and chemicals etc. I avoid all sodas and fast-foods too. Water is best after a workout.
I hope that helps. You should notice a difference after months. You'll have to read up more about it. It will take some effort and I think you'll be pleased.