I'm not sure how old but I believe it was around 5th or 6th grade when I started on violin and stayed with it until I first picked up a guitar around age 17. I am classically trained on violin and self taught on guitar, banjo and piano.
What gear do you use?
I own several acoustic and electric guitars but my main guitar is a Martin OM-28V with a K&K Pickup system . I only have one violin. It's the same Roth violin I've used since I first got it in 1972 and I've just recently installed a K&K Violinissimo Pro pickup.
Are you in a band? Have you been in bands?
I'm currently playing guitar and violin in the band Three Sheets to the Wind which is an acoustic trio playing a wide variety of cover tunes.