Breakdown of Quería preguntarle una cosa.
un
a, an, some
querer
to want; to love (a person)
le
to him / to her / to you (formal) / him (direct object, male person)
preguntar
to ask
Questions & Answers about Quería preguntarle una cosa.
Why is quería used here instead of the present tense quiero?
The translation says "ask you", but doesn't le usually mean "him" or "her"?
Yes, le is the indirect object pronoun for "him" and "her", but it is also used for usted (the formal "you"). Here, it attaches directly to the end of the infinitive verb to make preguntarle.
Could I put the pronoun before the verbs, like Le quería preguntar?
Yes, absolutely! When you have a conjugated verb followed by an infinitive, you can either attach the pronoun to the end of the infinitive (quería preguntarle) or place it right before the conjugated verb (le quería preguntar). Both mean the exact same thing.
Why does the sentence use una cosa (a thing) instead of algo (something)?
If I wanted to ask for a favor instead of a question, would I still use ?