As you read about the etymology of Etruscus: https://en.wiktionary.org/wiki/Etruscus#cite_note-4 some scholars have proposed that the term might be connected to the Turkish autonym Türk.
I think north of Eurasia should be generally considered as the land of Altaic, Uralic and some European non-IE people, there were certainly contacts between them in the ancient times, but IE-speaking people such as Iranian, Baltic, Slavic, Germanic, Celtic, ... came later to this region, probably in the 1st millennium BC, in the 2nd millennium BC they lived in the south of Eurasia, from India to south of Italy.
I think north of Eurasia should be generally considered as the land of Altaic, Uralic and some European non-IE people, there were certainly contacts between them in the ancient times, but IE-speaking people such as Iranian, Baltic, Slavic, Germanic, Celtic, ... came later to this region, probably in the 1st millennium BC, in the 2nd millennium BC they lived in the south of Eurasia, from India to south of Italy.