It's "avoir" which means to have, it agrees with gender and plural of a noun ex :I have a book :" J' ai un livre" and we have a book : " Nous avons un livre "
They are "balader" and "promener", and the nouns are "une balade" and "une promenade".
There is a difference in Spanish from Spain and Mexico. Much like the difference between England and America. Hermano is Spanish for brother, but "carnal" is a common expression for brother in Mexico. A lot of slang is used there.