Change the case of the selected iTunes track names to "sentence case": all lowercase with the initial letter uppercase. For example, "L'effet Que Tu Me Fais" could become "L'effet que tu me fais", and "Comme D'Habitude" becomes "Comme d'habitude". This is customary in many languages.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using Script Editor (AppleScript Editor pre-OS X 10.0) which is located in your /Applications/Utilities/ folder. More information is here.)
Set choice of various number tags of selected tracks incrementally
Gather audio tracks whose files contain no artwork metadata
Exports and then re-imports selected tracks' artwork
Perform search-and-replace on text in your choice of tags
Copy number prefix in Song Name of selected tracks to their track number tag
Export Playlist names of selected Source to text file