"How you..." and "What, you!" are English equivalents of the French phrase Comment tu...? or Comment, tu! Context makes clear which option suits. The pronunciation will be "kuh-maw tyoo" in French.
Comment tu fais? in French means "How do you do it?" in English.
Comment t'appelles-tu? in French means "What are you called?" or "What is your name?" in English.
Tu t'appelles comment? in French means "What's your name?" in English. The more correct form is Comment t'appelles-tu?
Comment viens-tu à l'école? in French is "How do you come to school?" in English.
"How are you today?" in English is Comment ça va aujourd'hui? in French.
"How are you?" is an English equivalent of the French phrase Comment vas-tu? The pronunciation of the phrase in the present indicative of the second person informal singular -- which literally translates as "How are you going?" or "How do you go?" -- will be "kuh-maw va-tyoo" in French.
In English, "Et toi tu t'appelles comment?" translates to "And what's your name?" It is a common way to ask someone's name in French.
Comment vas-tu après tout ce temps? in French is "How are you after all this time?" in English.
"How do you look?" and "What are you like?" are English equivalents of the French phrase Tu es comment? The question translates literally as "You are how?" in English. The pronunciation will be "tyoo ey ku-maw" in French.
"How do think you look?" is an English equivalent of the French phrase Comment trouves-tu? The question literally translates as "How do you find yourself?" in English. The pronunciation will be "kuh-maw troov-tyoo" in French.
"How are you?" in the sense of "What are you like?" is a literal English equivalent of the French phrase Comment es-tu? The question also translates less literally as "How do you look?" or "What do you look like?" The pronunciation will be "kuh-maw ey-tyoo" in French.
Comment vas-tu?