Firstly please get regular cleaning ( scaling and polishing) done to avoid gum problems. You can use any good toothpaste and a medium or soft toothbrush. If you prefer herbal , Dabur red is good for gum issues. Any alcohol free mouthwash like Colgate plax is fine. What is more important is how you brush and try to brush at least twice a day. After dinner brushing helps. Using a dental floss also helps.