The sad thing is that you can't 'target' your fat spots. Fat loss is lost across the body at an equal ratio.
That said those areas with more fat will lose them in a more noticable way. Ex. Your belly/chest/thigh/butt will reflect the fat loss faster than your arms might unless ones arms are very fat also.
Doing situps/crunches/etc won't fix those areas. Infact if you build muscle and your fat % never changes it will actually get bigger as your muscle pushes the fat out.
Walking/running/etc will all help burn calories. Combined with a healthy diet you can drop weight safely and keep it off. I'd say 4-5 meals a day for a total of 1800 calories or so with an active lifestyle would probably do wonders.
Stay clear of sodas, refined sugar, candy, etc. Chips & what not are also not the best.
Vegis, fruits, nuts, milk, fish, meat can make some great meals and help build a great diet for you.
As far as tummy programs after a C-sec (once fully healed) i'd say leg lifts, ball situps/crunches, holding ball between ankles and lifting leg up.
http://www.shapefit.com/exercise.html has a great pregnancy tab. Check it out
