Hi please tell if I not go by prophy jet or tooth polish only by using toothpaste n mouthwash mystaining can go? Prophy jet is different from scaling?

Professional Care. The best treatment you can receive for your smile is from a dentist. Toothpaste and mouthwash just won't remove what a dentist can. A prophy jet is different from scaling and root planing... both will help your overall condition.
Prophy Jet. A Prophy Jet is a complex very expensive specialized piece of equipment designed to be used by a trained Dentist or Hygienist. Even if you could purchase one, and could connect it and find a way to make it functional, without training you could only do yourself irreparable harm. Stained teeth, see a Dentist for best treatment. Don't waste your time and hard earned money on snake oil. See a Pro.
No and Yes. Saining will not go away with toothpaste and mouthwash. Must be removed by dental cleaning. Prophy jet can often remove the stain very effectively. Scaling has different purpose but may also remove the stain in many areas. Prophy jet blasts it away with fine particles and scaling scrapes it away with sharp instruments. After cleaning you can keep things clean with excellent hygiene. Good Luck.