You do not have to completely give up sugar or even processed food in order to lose weight and be healthier. You just have to watch the amount you eat.
There is absolutely no way I could give up sugar or chocolate completely since I have a major sweet tooth; and there a days when I would kill someone for a burger and fries from the drive through. However, for the last year and a half I have watched my portion sizes with Weight Watchers and increased my activity. Over that time period I have lost 70 pounds and gone from a size 20 to a size 12. My blood work improved so much my Doctor was actually giddy when she came in the room to talk to me about the results.
It was not easy and the money I spent at the grocery store did go up quite a bit; However, the money I saved from not stopping at the drive through multiple times through out the week pretty much evens it out in the end.