Exercises when done at home, can help with burning our calories, core strength and muscle toning. We can do a basic treadmill , some high intensity workouts for fat burning and core exercises like planks or squats. But these are mostly concentrated on toning the targeted muscles and letting go of some calories. They help to about 40% in building the muscles.
But to build proper muscles, one needs the right equipments, intensive workout sessions, proper protein rich diet with added supplements and a good physical instructor to get through with this. Muscle building takes a lot of discipline and pain and control on what you put into your body. Weight lifting exercises are a must to develop biceps and triceps. Going to a gym and doing these will also help reduce the chance of injuries.