Brief summary is, you can go for Annulment of Marriage & you can take ground of mental cruelty i.e., not participating in intercourse by one party amounts to mental cruelty and also on ground of non consummation of marriage.
Response to your Query:
1) Yes you can file for annulment (you can give reason of his treatment - Your Advocate will take care of this aspect).
2) If you request, yes court will direct him to go for Potency Test.
3) No. You are entitled for annulment, even if his test results improve.
5) Yes you can very well file case of cheating and fraud played by him and his family members (all involved)
6) Yes you can demand whatever amount you want as alimony, but the factors to be considered are your social status, his earning capacity, educational back ground, his social status, assets etc., nothing wrong in demanding huge amount but you need to justify the same. Don't do it for the sake of claiming, by keeping about point in mind you demand alimony.
7) Number of hearing, it cannot be said, the case may last on an average between 5 to 7 years, subject to compromise held by parties, it will be concluded earlier than above time.
It is advisable to file case in Mumbai, where you reside.
You hire services of Lawyer from Mumbai and file the case.
If you file case in Bangalore, you have to travel to Bangalore for each date of hearing.