What are some good work out exercise for your chest & stomach also good for losing weight and adding more muscle & packs

Exercises without weights do you mean? For your chest your probably looking at pushups and for stomach there's situps, crunches, leg lifts and a dozen things you can probably do without weights.

Spot reduction training is a myth for the most part. I saw a recent study that did indicate you can slightly do spot reduction by exercises, but it was minor. So don't think doing situps you'll loose bodyfat around your stomatch