As the flavortext suggests, these are "classical" scenes--scenes during which, if this weren't a library, the boss could hear classical music. Reordering the movies by their descriptions and taking the indicated letter of the composer's name (i.e. the composer of the music playing during that particular scene--hence "Rossini" for the Beethoven-filled Immortal Beloved) gives:
| Letter | Composer | Index | Movie |
|---|---|---|---|
| T | Mozart | (6) | Amadeus |
| H | Bach | (4) | Tomb Raider |
| I | Verdi | (5) | Pretty Woman |
| R | Bartok | (3) | The Shining |
| D | Mendelssohn | (4) | Four Weddings & Funeral |
| M | Mahler | (1) | Tampopo |
| O | Offenbach | (1) | Moulin Rouge |
| V | Beethoven | (7) | Die Hard |
| I | Puccini | (7) | Room with a View |
| E | Berlioz | (2) | Star Trek First Contact |
| S | Rossini | (4) | Immortal Beloved |
| I | Gorecki | (7) | Fearless |
| N | Hanson | (6) | Aliens |
| G | Wagner | (3) | Apocalypse Now |
| E | Bizet | (4) | Trainspotting |
| R | Strauss | (3) | 2001: A Space Odyssey |
| R | Barber | (3) | Platoon |
| O | Orff | (1) | Excalibur |
| Y | Tchaikovsky | (11) | Billy Elliott |
The message is THIRD MOVIE SINGER ROY. The third movie (by image or description) is Pretty Woman, and the Roy who sang "Pretty Woman" is ORBISON.
Training:
As suggested by "gamut from A to Z," this puzzle is trained by "Whoa--I Know My ABCs!" The training puzzle answer is REMOVE A LETTER, and there is only one way to remove a letter from "Orbison" to give a new word. The answer is ORISON.