I'm old school. I grew up with Kimba, Marine boy, Battle of the Planets (Gatchaman), 1980 Astroboy , starblazers (yamato) and Robotech.
Manga wasn't really a thing until the early 90's. I did work experience at a public library that had Barefoot Gen, later a shopping centre had a Japanese Culture display featuring the AKira books from Epic comics. Frederik Schodt's book Manga, Manga opened my eyes to manga history. A con I went to in 95 put me onto the Ranma 1/2 anime and I would read the manga version at a library.
What was the first Manga and Anime YOU loved?