I want to remove all the backgrounds and put all the images together as one image and then perhaps put some text in the middle.
(images to be layered half over the other image).
How can I do this? I assume it’s a case of removing the backgrounds somehow and then creating layers of each image?
First, you have to "cut" out the cars from the background. Then you need to bring in each image onto a new layer in the new file, where you can adjust the position of each layer, and then you can add text.
Here are some sites where you can get tutorials on Photoshop:
I don't use photoshop but I would assume you use the same things. When I've traced round what I want to cut out I right click/copy. Then I click on the new picture I'm pasting into right click/paste as new layer.