I used to do absolutely no weight training or anything that would give me any muscular strength, my stamina was pretty good, but that didn't really help me when I tried to cook spaghetti and my arm started violently shaking from the massive task of having to lift a pot of water. In any case being toned when you don't do any weights just highlights how little muscle you have so I'm not sure how cardio alone would make you aesthetically pleasing.