What's wrong?

So far, here's what I have gathered needs to be taken care of before I can ride it. There is definitely an issue with the throttle. The cable looks old and crummy so maybe once I replace it, it'll get better. Now I just need to figure out how to replace it. As a matter of fact, almost all the cables look like they need replaced, so that will be next order of business. It is possible that I need to adjust the idle, but I have looked and looked, and I cannot for the life of me find the adjuster. I think I know what it's supposed to look like. I read somewhere online that sometimes you need to adjust the carbs for timing and that this can affect the idle. But for now, I'll assume it's the cable. Here are some pics, too. I was also told that I need to have the carbs cleaned. That sounds like a good idea. I am also very concerned about the horn not working. A girl has got to be able to make some noise. Later.