That I played? Intellivision, Atari, or Commodore 64. I was too young to remember which for sure, and they belonged to my (quite a bit older) siblings. I have vivid memories of this train track simulator game as well as some game where you're a robot needing to explore and find batteries on the Commodore 64.
That I owned? Random Tiger electronics games, but I'll count the NES as my first.