As far as I know there are no stock photos available to use.
You could always find an image (copyright free) on the Internet to use. You would right click and "save" the image to your own computer. Then go to your "your account" and change your profile picture. You would "browse" your computer for the image you saved then upload it.
If you have a scanner you can scan a photograph and save it on your computer to upload.
If you do not have a scanner you use a photo machine kiosk in stores like Target, Costco, and Savons.
You can scan, or copy all your photos to a disk then use that disk at home to upload pictures on your profile.
Hope this helps.