Hey, to tone yourself up keep running and any cardio , but also
exercise to build some muscles such as ABS workout ( crunches, sit ups, v sit ups, leg raises etc), thigh/butt workout ( lunges and squats are the best ) if you feel like they come easy to you, add some weights to make them more effective.
As for the food, if you’re already eating healthy ( vegetables, proteins, fruits, etc) and drinking a lot of water then you’re good. You can eat whenever you want as long as its healthy, don’t starve yourself and in between meals grab some fruit or nuts :)
If you need anything else I’m here