How to learn basic French less than a month?

I'm going on a french trip on the 15th, and unfortunately my school got me into a spanish class, instead of french (long story...). At first i thought we don't even need to speak french, but then, our teacher said we are going to a market in paris, so it's a good opportunity to study French. But the thing is i can't speak french, except things like the beginner words (bonjor, sa va ( i know it's the wrong spelling), salut, j'adore, j'deteste, numbers 1-10 (probably... :/) merci, madame, monsieur, auvoir). and i don't know how to pronounce most of the word from the dictionary, so please help!!!!!