I started on guitar, but not seriously when I was about 9 years old. It was my older brother's first guitar, which was an acoustic guitar that I can't remember the brand name of. He had no use for it anymore once he got his brand new '66 Gibson Firebird. It wast too hard for me to press the strings down on that guitar.
When I was 13, my parents bought a two keyboard Baldwin console organ. It was a big piece of furniture that they thought looked good and they figured. I would enjoy playing that as well, which I did. My father did also. I think he played it as much as I did. This is when I started to learn to read music and learn music theory.
When I was 14, my brother got married. He's one of those guys that barely ever touched their guitar anyone after the get married. So just before I was 15, I asked him if he'd mind if I took hid guitar to learn on seriously. He knew I would take good care of it, so he didn't mind and just gave it to me for as long as I wanted to hold on to it. His '66 Gibson Firebird is a good looking, sweet sounding and playing guitar. Then I started playing guitar in a band with a few musician friends, but I always really liked the sound of the bass guitar and I heard of so many bands looking for a bass player, so when I was 16, I decided I would get a bass guitar. Although my deep passion for Rickenbacker basses had already started, at 16 my first one was a Univox Hi-Flyer. When I was 18, I wanted a name brand bass that rock stars were using. I really wanted a Rick, but didn't have enough cash and got a '76 Fender Precision. I should have just waited a little longer.
Finally, just as I turned 22 and had my first real full time job, I got a brand new Jetglo 4001
When I was 28, I started teaching bass guitar. I taught for several years, back in the Bronx, NY. It really reinforced my reading of music and theory knowledge. I also had to really control my playing technique, so not to pass on any bad habits to students.
I've always played bass fingerstyle until a few years ago when I got my 4003S/5, I forced myself to play with one. I should have played with a pick as well as fingerstyle right from the start.
One of these days, I should get back into teaching bass again, but first I'll have to brush up on my music reading! It's a rewarding experience to see someone progress into a great bassist (or what ever instrument they play) under your guidance.