By design, System Restore does not delete files in the "My Documents" folder. That would include the sub-folders, such as My Pictures, etc. It also doesn't delete emails, nor would it be expected to restore them if they had been deleted by some other process.
But System Restore can and will remove files from the Desktop if said files are different than those that were there when the restore point was made. Even then, however, the types of files that System Restore might remove from the desktop when going back to a restore point are most likely executable files. Picture files aren't in that category.
Did you use some other 'cleaner' like CCleaner because SR didn't remove those docs.