Yaaaay vegetarian! 🙂 haha you can’t specifically get rid of fat in your legs/thighs, but cardio will help you reduce your overall body fat! To get nice lean muscle, lunges are my favorite. Also squats! Just make sure you have good form. Running is awesome because it’s cardio and working your legs at the same time.
Lastly, Cassey Ho has some great workouts here! She makes them enjoyable 🙂