In your lateral view, you can see the lower abdominal wall is bulging anteriorly. This may be a result after pregnancy. You may or may not need a tummy tuck. You need to be accessed in person to see how much of the bulging is internal and how much is abdominal wall fat. You would benefit...
The anesthesia is not a concern. I would ask your ptosis surgeon how soon he or she is comfortable with you being positioned on your stomach, which is often done for lipo 360. You can also clarify with your plastic surgeon whether that is a necessary position, or if they will just turn you side...