no
.
give up your Indian citizenship
no Yes, the UK is not part of the schengen zone.
Yes,but better to get before leaving UK.
Yes.
yes they can.
yes
Yes, Indian tourist visa can be extended on medical grounds.
Yes, they are both possible.
No, a UK visa is only valid for the UK. You need a "Schengen visa" for Switzerland.
Go to the British Embassy
No, the United Kingdom is not part of the Schengen Area. Schengen visas are not valid.