Hello slal,
I am very much in your situation, and have been asking a few other friends.
I will give you the info as far as I gathered.
i) Get your & ur spouse' birth certificates in order, as in, it should contain your names (respectively) in it.
ii) After you marriage, get the marriage certificate as soon as possible.
iii) Get an affidavit stating that you and your spouse did not ( I am presuming this coming from India

) have any kids together or with anyone else before marriage. I am afraid I would not be able to tell what happens if any one of you DID have a child.
Take documents from point i) , ii) and iii) : get them attested by the local District Magistrate office, home secretary of your state and then the Foreign affairs ministry in Delhi.
After this you will have to fill a form in Swiss embassy in Delhi, deposit approx Rs 30k, submit all the attested documents along with the stipulated 2.5 room apartment contract (again no idea WHY 2.5 minimum but I have stopped asking

) in Switzerland and then wait.
If every document checks out, and your salary in Swiss is high enough (again, I have no clue how much is 'enough'), and you have not been doing any 'funny' thing in Switzerland till now, the process (I have been told) takes about 6-8 weeks.
In the meanwhile you can also bring your wife, saying the Spouse VISA is being processed and she be allowed to join you in Switzerland. The VISA she gets is for 3 months strictly, and by then she will have the Spouse VISA ready in Delhi for her.
I have also been told that one may gather the Spouse VISA once it is done only in Delhi , and not in a neighboring country like Germany or France. Validity of the sentence remains to be checked. If you find out otherwise, do let me know!
But definitely know that, all that you read till now is not from the horses mouth. Do make a call at the Swiss embassy in Delhi to know the exact procedure yet again. Just that you do not miss anything.
All the best and wish you a nice wedding ...