If i eat 6 small meals (instead of 3 regular meals) per day, will that raise my metablic rate?

No: Eating several small meals will not raise your metabolic rate, but may decrease your overall caloric intake. For instance, eating 150-calorie meal 8 times a day would give you 1200 calories. Most people require 2000 calories a day. This would mean he would have an 800-calorie deficit and would lose 1.5 pounds per week on this kind of diet. You most likely will not fill hungry with small meals.