I think it was either Zeppelin IV or Presence. My brother was always bringing home albums. I remember him getting DP's Machine Head, Aerosmith's debut thru Draw The Line, Kansas' Leftoverture and Masque, a bunch off Kiss. But I remember liking the name Led Zeppelin so I asked my parents for that. I'm pretty sure it was IV. The first album I actually bought with my own money was Foghat Live.