Depending on how may repetitions you can complete, yes. These exercises target the back and biceps. You will sollicit the biceps more with the chin-ups due to the greater range of motion into elbow flexion when compared to pull-ups.
You can perform many body weight exercises to stay "toned"...If you really want to stay at home and out of the gym, you may eventually want to consider a weight vest to add some resistance to your exercises. A stability ball is probablynot a bad idea either.