I have had 3 c sections, 2emcs after pushing failed ventouse and forceps and 1 planned with an emergency hysterectomy. At 2.5 weeks I was still on maximum pain relief and doing very little. It took 12 weeks after my last c section before I could do the school run.
Things that can help:
Time your pain relief so that your peak pain relief coincides with times of most activity. You may find taking paracetamol and ibuprofen at the same time works best if you have to be really active, otherwise space the doses.
Buy in pre cooked meals for the days you are on your own with the children.
Get DH to bring baby to you for feeds in the night and if you can feed lying down for some of the time.
DH to bath children. Newborns don't really need bathing all that often, top and tailing will do. If that is not possible use a step stool to enable dd to climb in and out of the bath.
Activity boxes for dd, you can sit and supervise whilst feeding if necessary. For example colouring in box, playdough box, books box, duplo box, dolly box, play cooking box. Get DH to help you by setting up some stuff the day before e.g. make a den out of blankets.
Get dd to help, fetch nappies etc... Helps them feel included in baby related activities.
Read to dd when feeding baby.
Use cbeebies/tv/dvds if you are really tired and just let dd play around you whilst you lie on the sofa.
Try to walk a little further each day than you could the day before (at the peak of your pain relief) then plan rest time in for afterwards. I do mean small steps you know, like to walk to the end of the garden then 2, then 3x or a certain number of houses down the road and back. It will help with the scar tissue pain if you can do gentle short walks each day, hard as it is in the short term.
It does get better. Be gentle on yourself.