Alter some Images of coins

I have 619 images of gold, silver, platinum, and palladium bars and coins. I need them to be all altered to the same two sizes for each image, with consistent drop shadow and a consistent color for each metal (gold silver, platinum, palladium...almost all coins/bars are gold and silver but the color between images does vary. In addition, about 200 of the images need some improvement in the image (such as removing spots, improving lighting effects, removing some writing on the items, combining some separate files into a single file of images. I have attached a some examples of the the files to be altered. Based upon my analysis, there are the following breakdown in requirements. Resize only - 94; Resize and ensure proper drop shadow - 314; Polish up, improve lighting effect, remove spots, remove and replace serial numbers - 146; Combine images into a single image - 13 files into 2 image files; split double image of both sides of coin into separate images and polish, improve effects and remove spots - 51. Create coin looking image from adobe illustrator file of coin design (design already done in file) - 1.