First off, talk to your physician. There are floor exercises you and your toddler can do together (Check at a book store, library, or Spark People/Internet.). Get yourself some hand weights (2 or 3 pound ones to start). You might get some "play" weights for the toddler so she can "copy" Mommie.
Take walks with the little one. Go to a play park with her.....take part in the activities such as swinging, etc.
Try to eat more veggies and fruit....Drink plenty of water.
.Use Spark People's Nutrition log to keep track of what you eat. (Also check the Slim-Fast site....) Try to avoid eating junk food.
Keep busy. Keep positive! It takes time and perseverance but you WILL get there!
Good luck! Have fun.