Please share this answer with your parents since you are under 18 years of age. Rhinoplasty can be done on a 15 year old however, the breasts do not fully develop until 18 years of age. Breast Augmentation with breast implants is a life long committment as a single set of implants will not last a lifetime. For that reason, it's best to be a bit older, than 18, to accept that level of responsibilty. Hope this helps.
Web reference: http://www.drfpalmer.com/Rhinoplasty.html