To be perfectly honest I'm not sure what the first concert I went to see was. It might have been something classical with my parents. I'm pretty certain the first pop performance I saw was The Amen Corner, in around '64 (or was it '66?). Saw Pink Floyd in '67 and numerous pub blues bands, including Champion Jack Dupree at that time.

Again, the first record I bought? Probably the Shadows 'Frightened City'. First EP (two weeks pocket money at the time): With the Beatles.
First LP: Beatles for Sale.

Regards