I need to edit some product photos

1.
I have 6 product photos that i would like to edit. I need the background whited out. This needs to be done to a high standard.

2.
I need 2 of the best images to be rendered on to a real life background as shown in the example 1 photos attached. The completed project will have 2 separate real life photos each with the Alligator teeth rendered into the image across the road.