the first computer I used was in school and was an "RM Nimbus" for people in the UK, the brand RM - research machines is well known throughout schools, - and I now work with a load of people who have worked at RM...
that machine was a 186 running DOS 3 or some such, everything needed to be loaded from floppy drives, and as I'm talking primary school, (ages 5 - 11) things were loaded by staff, or usually the command you'd need to type to get the thing you wanted was written on the disk label.
The first computer my family owned was a Packard Bell, Pentium 75 with 8MB RAM.
it changed my life in as far as I discovered that I was able to make music and videos on a computer, also made school work a bunch easier, (I was 13 or 14 when we got that.)
I also learned to program, first in Q basic, then in Visual basic.
the first computer I owned myself, was when I was at university, (I couldn't afford a computer), and my friend gave me the main board from his P133 (with processor) I went dumpster diving and found RAM, managed to get a monitor from where I worked from stuff that they were throwing out.
the graphics adapter (onboard) had been damaged by a power surge, and one colour was damaged (I think no red)
but it let me at least get a screen where I was able to use DOS as an OS, I could use the Edit program to create plain text files that I could work on without needing to spend all my time in the library, and could work when the library was closed. writing up work in plain text files and then formatting reports on the university computers using word the following day ready to print and hand in.