The first Disney cartoon I remember seeing in theaters was Pinocchio when I was about 6. I may have seen others earlier, but this is the first one I remember. Grandma took me to the local movie house near her home (about a mile from where I live 63 years later). The theater is long gone. I loved the movie so much she bought me the big Golden Book version that Disney used to put out of his movies. I also own the movie on Disc and watched it again about a month ago.
I loved the music (I Got No Strings, When You Wish Upon a Star, The Actor's Life For Me, etc.)