Start by opening some images you want to convert into same color tone. We want to change color tone of images based on the color tone of car image.
Select the image you want to change color tone. We've selected the first one. From image menu select Adjustment>>Match Color.
Select the source image in source menu. Select the target image in layer menu.
Similarly select the other images and define the source and target image files. You can adjust the luminance, fade and color intensity according to your requirement.
Below is the result of using match color. All images now belong to the same set of color tones.


