I put pictures in a coby MP-C853 and i can't get them out.

Sounds like to me you got yourself in a bit of trouble, but luckily I maybe able to help you out ;)

Connect your mp3 player to your computer. Go to My Computer and look for the mp3 player, it should show up as a removable disk. Next, right click on the removable disk and select explore. This should open a folder containing the contents of your mp3 player. You will see folders labeled music, images, videos, ect.... Find the images you want to delete, which should be in the folder images. Click on the image(s) and right click it, then select delete.

Hope this helps <(^_^)> thanxx