How many times a day should you, wash your face? and should you wash your face with cold, warm, or hot water?

Depends: Do you have oily or dry skin. There is no right answer to this question, but what feels right to you. Oily skin can be washed more often and even can use hot water. Dry skin needs to be washed less often and use milder soaps, warm water. In winter wash less often than in summer or hot weather. I think warm water is usually better unless you have really oily skin.