musical elements of March to the Scaffold by Hector Berlioz and Danse Macabre by Saint Saens?

i need help with the musical elements of these songs, such as the instrumentation, rhythm, texture, timbre and key. thanks

Here is a good bibliographic index:

I would suggest you take the score (any good music library should have it) and listen to the music. That would give you all the information you need. It doesn't take THAT long.