Is it easier to lipo a thin person with muscle, or a thin person that is all flab?

Most of the time liposuction is not a judgment call. The plastic surgeon stops the procedure with no more fat is able to be extracted. In the end however is the appearance not the volume of fat removed that is important.

You would have to receive parental consent at 17 years old. It would benefit you to wait and let your body develop further.

You should use the garment that your surgeon recommends after liposuction of these areas. In the end however there's no evidence that compressive garments have any effect on the long-term outcome.

Any time that you are post-surgical and you develop chills/fever/swerats, you should contact your surgeon immediately just to make sure that it is not an infection.  The body goes through some strange changes after liposuction, but chills and sweating are usually not part of the recovery...

Working out can condition the deep musculature but will have no effect on redundant skin. The only solution to excess skin surface area surgical excision.

You can effectively have all of the fat removed by liposuction although this probably is not a good idea. Liposuction will have no effect on the size of the penis.