I hope that you were able to meet with an experienced surgeon to have these questions all answered. All of your questions are important ones to discuss for any hair transplant patient. 1. Yes, donor hair can be taken from many sites of the body: scalp, beard, chest, back, even leg and groin. Some areas are worth avoiding so have a detailed discussion with your surgeon. 2. Yes, if the procedure is performed properly and there are no major changes to a person's health over time, the hairs will grow WHERE IT IS TRANSPLANTED TO. BUT: NO, the donor hair will NOT grow back in the donor area from which it was removed. 3. Any donor area, if very closely examined by a trained professional, will have small, circular scars which have no hair and sometimes noticeably less color. So in the worst case, it would look white (or colorless) next to your normal colored skin. 4. In most patients, prevention medications (like Rogaine/minoxidil, Propecia/finasteride or other brands) should be used to help decrease the speed and amount of future hair loss. That is just a basic principle for hair loss patients: Keep as much of your "native" hair as possible so you have to have less surgery over your lifetime. 5. Density can vary based on each patient's needs, goals, and available donor area. If the transplanted are can get to 30-50% of "normal" density, it generally makes for a very nice result. Hope all of this helps!