Hello I could use some help on putting together a system I bought for $100. (pics inside)

Hello one of my buddies had a bunch of equipment that he wanted to get rid of and he gave it to me for 100 bucks. Here is the album. I have little to no knowledge of car audio or audio in general, but this looked like a good deal and I wanted to help my buddy out. Do you have any advice on what to use, how to set it up, and anything else that I need. Thanks for the help. If you have any questions I'll get back to you as soon as possible.