Hello dear,
I understand your concern.
Here are the answers for your questions:-
1)Yes you need to stop feeding for the baby.
Because if you continue to feed the nutrition will not suffice for the proper growth of the fetus.
So you need to stop feeding the first baby.
2)Due to ceasarian section you will get a scar over the
uterus.
The integrity of scar depends on many factors like:-
a)Gap between the pregnancies-Atleast 3 years of gap is said to be good.
b)The healing process.
c)The indication of surgery.
etc.
As the gap between the two pregnancies is less the scar might not be strong enough to withhold the
stress during labour pains.
Anyway the decision of mode of delivery depends on the scar status at term.
3)In case of planning ceasarian again it need to be planned a week earlier to expected date of delivery ie., around 39 weeks.
Hope this helps.
Best regards....Dr.Srilatha