After pregnancy I was left with loose skin and marks what Type of surgery can I do to fix this? how much will it cost? (photos)

Hello and thank you for your
question. Based on your photograph, you are a great candidate for a tummy tuck
with liposuction.  This can be done
through a low and short incision, all completely below the bikini line.  The belly button can be designed to look
natural and have no scars on the exterior.  
Your muscles can also be plicated resulting in a flat abdomen.  Cost varies based on geographic region and surgeon expertise.  Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.  The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D. FACS
Harvard-trained plastic surgeon

Thank you for your question.  Based on the photos, it does appear that you are a good candidate for an abdominoplasty (tummy tuck.)  This would involve the removal of the excess skin, muscle tightening, and liposuction of the flanks. It is always best to consult with a board certified plastic surgeon.
Take care,
S. Alexander Earle, MD, FACS
Board Certified Plastic Surgeon

You have developed a significant degree of saggy skin on your abdomen and a very protruding belly because of very loose muscle and also certain deformity of your belly button. So you are a perfect candidate for a Tummy Tuck in order to get rid of the saggy skin, transform into a beautiful belly button and very importantly in you: performing a Tight Muscle Repair will be key to achieve a flat abdomen and smaller waist. I would do a very low incision to easily hide the incision under a bikini and I would complete the beautiful transformation with some liposuction to waist and lovehandles to enhance the body shape. So be encouraged!!! You will look astonishing!!Dr. Cardenas