I Mounika please give suggestion

You file  a petition for maintenance under Hindu Adoption and maintennace Act or section 125Cr.P.C.againast  your father. He is duty  bound to maintain you with arrears of maintenance amount till you are 25 years oid  and incur expenditure efor your Marriage as well.

I agree with expert advise of Ms. Usha Kapoor and would like to add the age of daughter for liability/grant of maintenance is "till she gets married and unable to support herself" and no age limit as stated to be 25 years.

Whether the property transferred to step mother's name was self acquired by your father or inherited? If the property was inherited, you can seek partition and possession with damages and mesne profits by filing a civil suit in district court where property is situated, through a local prudent lawyer.

Yes! certainly. There is no bar to it  looking at any point of view  as it is not illegal  or  immoral or opposed to public policy.

You have not informed of your close relatives, your marital status, occupation etc.  One has to live with mental peace whether it is a hut or a Mansion, can you live, tolerate and face the risks of staying in the same house where your step mother is residing and can you maintain proper relations.   Do not jump into conclusions with immaturity, particularly when the court while sanctioning the divorce to your father might have decided your custody .