Learn Turkish: Geleneksel bibloyu saat kaçta alıyoruz? - At what time are we buying the traditional figurine?

We add the specific accusative case ending -u (with a -y- buffer letter) because we are talking about a specific object: "the traditional figurine". If we were just asking about buying any traditional figurine in general, it would remain in the nominative case: geleneksel biblo alıyoruz.

How is the word geleneksel (traditional) formed?

It is formed by adding the suffix -sel to the noun gelenek (tradition). The -sel / -sal suffix works exactly like "-al" or "-ic" in English, turning nouns into related adjectives. Another common example is tarih (history) becoming tarihsel (historical).

Why is the locative ending -ta attached to kaç in "saat kaçta"?

To ask "at what time", Turkish attaches the locative case (meaning "at/in/on") directly to the question word kaç (how many/much). If you just ask Saat kaç?, it means "What time is it?". Adding the suffix gives you Saat kaçta? ("At what time?").

Why does the verb alıyoruz (we are buying) use the present continuous tense for a future plan?

Just like in English ("At what time are we buying it?"), Turkish frequently uses the present continuous tense (-ıyor) to talk about fixed, scheduled, or planned events in the near future. You could also use the future tense (alacağız), but alıyoruz is very natural for a confirmed plan.