High cholesterol can be genetic and not necessarily tied to the foods you eat. High blood sugar is a pre-cursor to diabetes. Eating too many calories versus what you burn off, over time will increase your blood sugar.
But the best thing you can do is watch your food intake and go for a daily, vigorous walk for 30-minutes to an hour.
I have always run or walked daily since I was a college kid. But I changed my diet when I developed your same issues. Cut out or cut down on the processed carbohydrates you eat and eat more meat and simple carbs. Eat some fat too.
I have lost 55 lbs in just under a year, my blood sugar reading has fallen into normal range and my cholesterol have dived to 106. My doctor told me to keep it up because my health vitals have improved dramatically in the last year.
Good luck whatever you decide to do. Our good health is really all we have.
:-)