What could be causing my muffler, (I think), to be shaking and making noise?

What is your question?

While the car is on, the muffler and or exhaust I believe shakes and makes a ticking noise. it idles and sounds a little loud and sounds like a diesel, or motorcycle even. Is the tail pipe connected to muffler, if so it looks like the pipe is not inside the muffler all the way..I'm really confused and just moved here to California, cant afford anything expensive. Don't want to have to junk it because of CElight, if so I'll drive back to Iowa.