I don't recall my manual ever mentioning the need to lubricate it and have only ever put a drop of pelligun oil on every 2nd co2 cannister or so....never had any problems with it.
The real thing is a lot lighter than the pellet version. Out of curiosity why didn't you buy her the real thing?
If your daughter has small hands I'm not sure she will particularly like the 92fs. I'm surprised it's the carry gun for the Canadian police.