Jesus Christ. First off, you may have gynecomastia, which means breast tissue on your chest. Best exercises for chest are dumbbell and barbell bench press and weighted pushups. These won't decrease it in size though, they will build muscle. If you have gyno, however, you need surgery to sort it out. Losing fat, or having breast tissue removal (if you have gyno) is the only thing that will give you a normal chest.
Abs are made in the kitchen. You need a low bodyfat percentage to see your abs, which means having a better diet. Secondly, if you're not willing to use weights then you're not going to be able to build your abs up. Muscles require resistance to work against to build size.