Your First Vinyl Album.

Cheap Thrills - Big Brother and the Holding Company. That one record that I bought for $1.99 at the K-Mart in Brighton, MA in 1969 age 12 started this whole long journey into the netherworld of guitars, amps, hifi equipment, vinyl, CDs, etc, etc, and untold $$$ and one's-that-got-away later.

Ken Dodd and the Diddymen.

I played it for hours and hours (I was only 5).

First single 78, Let Me Go Lover by Joan Weber
First single 45, Down The Road by the Cadilacs

Mountain "Climbing" I was 12 yrs old

Either Johnny Winter, "Second Winter", or Savoy Brown, "A Step Further", cannot recall which was first, though they were the first two. $3.99 at the Woolworth IIRC. Of course, that's if you paid retail. My friend's sister worked the cash register and HEAVILY discounted all album purchases for me. (Bar code scanning was yet to be used.)