I started out on a Didaktik GAMA. It was really more my dad's computer, but my brothers and I used it much more, mainly for games. Some of my earliest games that I remember are Cauldron, Rambo, Renegade and Dizzy, but I have no idea which was the very first.
In our village, everyone had either an Atari 800XE or a Didaktik. One of my classmates at school had a Commodore 64, but that was another level. I'd bet most people here started out with one of those first two.
ZX Spectrum maniac
KOKA sušenky
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Bart