Court marriage as we call it is solemnized under the Special Marriage Act, 1954 all such marriages can take place between any two Indian citizens as well one Indian citizen with a foreigner irrespective of their religion, caste or creed, and you can say this is the secular form of marriage available in our country. Such a marriage is solemnized before the marriage officer/registrar usually D.C. deputy commissioner of the area (Sub registrar/SDM is the marriage officer/registrar only in case the already solemnized marriage under any other Act has to be registered) where both or any of the parties to such a marriage reside permanently or for at least one month.
Cost of such a marriage as the rate prevalent in your area. Now how you proceed? Both the parties to the marriage file a joint application/notice before the marriage officer along with individual affidavit attested by notary public specifying the age(boy 21yrs &girl 18yrs), place of residence, marital status(unmarried or divorcee as the case maybe), mental status(not idiot or not with unfit mind), not related to each other. Along with this you have to give proof of age (School certificate, Passport, Pan card), proof of residence (Passport, ration card, voters ID card, rent agreement), & the application of such a marriage should be witnessed by 3 independent adult persons (parents are best witnesses), affix one photograph of each of the parties & all the 3 witnesses.
You have made such an application/notice to the marriage officer in person along with all the 3 witnesses. On receiving such an application the marriage officer issues a month notice regarding the intended marriage & get such a notice affixed on the notice board outside his office, a copy of such notice is sent to the marriage officer under whose jurisdiction the other party lives, also a copy is to the individual parties address.