1. I would have advised filing for divorce, notwithstanding that the marriage is not a year old, in the event that you had some proof of the domestic abuse you have suffered at the hands of your husband and parents-in-law. However, as per your own submission, you do not have any proof yet. So it will not be wise to file for divorce yet. For the next 6 months you should collect proof of the domestic abuse in the form of audio/video recordings so that you have sufficient ammunition when you go to court for divorce. After the marriage attains a year, and the conduct of your husband does not change, you may file for divorce on the basis of the proof collected by you.
2. The jewellery that you brought from your parental house at the time of your marriage is your exclusive property. Your husband or in-laws cannot keep it in their custody.
3. You can file a case for dowry harassment in court against your husband and in-laws which can result in them being prosecuted and punished with an imprisonment of up to 3 years.
4. You may also file a case for domestic violence against your in-laws and husband to seek a restraint order against them. This restraint order once issued will restrain them from subjecting you to domestic violence again. Furthermore, you may seek compensation for the abuse suffered by you so far. In addition thereto, you may also seek maintenance from your husband.
5. Under the existing law you have no right on property of your husband. However, this may undergo a change if a new law proposing to give to wife 50% share in the property of her husband is passed by the Parliament.
6. You can ask for return of 1 lakh rupees that you spent on the wedding.
7. You cannot seek reimbursement of the amount you spent towards household expenses as this was done by you from your own free volition.