This is a question people ask me often. I like to say that this cannot be answered that easy. why?
Because everybody is different, everybody has different body, different shapes, different type.
therefore it is depends on many things. for a person who is obese, overweight, out of shape, I would recommend to lose weight first with big amount of cardio, but do not neglect the weight training part. but at first focus on cardio to lose weight, then slowly start with weight training in order to get toned and get lean muscle mass. People who are not that overweight, who just want to get rid of some fat on certain body parts, I would recommend to focus on more weight training, but still do cardio but not too much!