What does tallez vous mean in English?

Answer 1

I assume you mean "comment allez-vous?" in which case, "tallez" is not a word. The t is obtained by contraction between the "t" of "comment" and the "a" of allez". In this case, "comment allez-vous?" means "How are you?".

However, "tallez" itself is the conjugated form of the French verb "taller", which means "to grow small branches". This is used when talking about plants, and it would be extremely weird for it to be used in the manner you described above.