Is there any way of bringing in multiple images at the same time into a HTML page in Dreamweaver?
Nope. That's not how HTML works. DW isn't a gallery creator. Look at Lightroom.
I am trying to place about 70 small thumb nails on the same page.
You could use PHP to dynamically generate a gallery of thumbnails from a folder of images on your server.
See link below for details:
Alt-Web :: PHP & Fancybox Photo Gallery
Nancy O.