My very first bike was a hand-me-down from one of my Dad's friends' daughters. It was a blue & white Schwinn with blue tires and coaster brakes -- I'd say vintage 1970. We replaced the seat with a white mini-banana style seat because the springs were shot in the original one. I always loved the blue tires though. Wore em out!
I learned to ride on that bike.
My first brand new bike was a (gasp!) pink Huffy "Rambling Rose". Yep, that was the name painted on the chain guard. I never would have chosen a pink bike, but it was a Christmas gift (and I think it was Mom's idea). Still, it was tons of fun to ride around the neighborhood or up to the mall. The banana seat was big enough that I could give my little brother and sister a ride -- not at the same time though.