"¿Qué necesitas para el colegio?" means "What do you need for high school?". The word "colegio" does not mean "college". That would be "la universidad".
"¿Cuántas clases necesitas para los dos programas?" means "How many classes do you need for the two programs?"
Translation: What do you need to drive?
You need a dictionary for art class.
It means,"What do you have in your backpack?"
It means "what do you need for English class". In order to respond, you would say in Spanish what you need for English class.
for
"Soy para ti" translates to "I am for you" in English.
"Preparada para" in English means "ready for" or "prepared for."
This means, "What do you need for the math class?"
"Que soy para ti" translates to "What am I to you" in English.
For the hair
for the day . . .