My Dog Has Black Areas On His Skin My Dog Has Loose Throat Skin?

My dog has loose throat skin? - my dog has black areas on his skin

There are chihuahua was hanging out of my skin is that it seems to stretch or something, and I think it's because he scratched his neck a lot? but not in proportion to the area, only the neck left ... O_o Oh, and I also found the black bean trifle look at the cover ... Is this a tick? and how can I get rid of him?
Oh, and another idea How can I clean my ears, because the dogs are dirty way