Pan masala stains can be removed by use of chairside air abrasion equipment. For leaving the habit of tobacco you will need the help of a trained counceller.

Tobacco stains cannot be removed by mere brushing.  You can undergo professional cleaning to get rid of them. However quitting your habit is essential. You can go for counselling or try substitutes like nicotine gums or lozenges. Hope it helps

You are chewing pan masala with tobacco means you have stains on your teeth It is not possible to clean the stained teeth without scaling because deposits and stains can’t remove without scaling . Tobacco is harmful for you. You should quit your habit gradually , use another substitute like chewing gum, lozenges, mint inhaler etc.

There is only one ethical way, get the scaling done by professional.   To quit tobacco, primarily you have to develop a will power within to do so before meeting any professional trainer because they only play a supportive role.