How many tools that must provided to maintain the quality system in our establishments?

Quality is a way of THINKING and BEHAVIOUR :)  

Question is clear enough actually. 

Quality professionals would find this question an indication that there is a serious lack of understanding about quality out there. There are no limits to the number of tools you might use to sustain a quality system. The tools you do use depend on various factors. If you have responsibility for maintaining a quality system, I urge you to bring in a consultant. Too many companies launch initiatives without sufficient expertise in many business processes. In all my years, I never understood this for companies interested in customer satisfaction.