if i buy a new steam engine shell form bachmann does it come with the bell and whistle on the santa fe 4-8-4 shell
Look at the diagram page and you will see what comes with the loco.
You really ought to include more details in your questions.
Rich
Like Rich quoted look at the diagram.
Here's the shell supplied to one of Bachmann's steamer's.
http://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=66_68_159&products_id=951
Appears to come as it would with a new loco, less the drive train.