¿Qué tipo de tour le gustaría hacer?

I'm a bit confused on the last part of this - 'le gustaria hace'. Why is 'le' needed? - what kind of tour THE would you like?

Hola, David. I think you're confusing Spanish and French. "Le" means "the" in French but not in Spanish. In Spanish it's a pronoun that means to him, to her, or to you (if you're using the formal "usted" form for you). The verb "gustar" means, literally, to give pleasure to" or "to please," but it's usually translated in English as "to like." Thus, the sentence you quoted means "What kind of tour would he/she/you like to make?" I can't stress enough how important it is to supplement any audio-based language course with some grammar resources. There are a bunch for free online and there are also some good books such as "Búscalo: A Quick Reference Guide to Spanish Grammar and Usage" that I find absolutely essential. There are other messages elsewhere in this forum where I've discussed this in the past.