Calf building exerices...you'll feel them! Of course anytime you exercise your legs you're exercising your calves some, but if you go to a gym, especially, avoid using heavy weights if it's an exercise involving your calves (light weights tone, but heavy weights tend to "bulk you up" more.)
Yes, I definitely do other exercise. Yoga is great, but not a big calorie burner, so I still do cardio (zumba, elliptical, walking, etc.) I've been doing yoga (just videos at home, no formal classes) for about a year. Not every day, but a few times a week on average. I definitely feel better and my legs are definitely longer/leaner. Of course that's not all due to the yoga...but I think it helps a lot. I still have a good amount of weight to lose...but I think I will look much better when I get closer to goal becaue I'm doing yoga now