Final answer:
Archaeological evidence suggests the presence of Indo-European groups in Anatolia from at least 3500 BCE, well before the arrival of Kurgans, with earlier agricultural settlements like Çatalhöyük dating back to around 7200 BCE.
Step-by-step explanation:
The presence of the Indo-European family in present-day Turkey before the Kurgans extends back to various migrations that took place over millennia. The earliest indication of agricultural settlement in the region dates to Çatalhöyük around 7200 to 6000 BCE. However, the specifics of when the Indo-European groups such as the ancestors of Tokharians or Celts arrived in Anatolia is less clear-cut. The reference to Indo-Europeans, such as Aryans, migrating from the Eurasian Steppe around 3500 BCE suggests that Indo-European groups could have been present in Turkey well before the Kurgans, who are typically associated with a later time period.