2001 Volvo S60

Electrical problem
2001 Volvo S60 118000 miles

I bought my Volvo 2001 from a used car dealer back in Nov. 2009. A couple months later it started acting strange. The dashboard stopped working, the turn signals wouldn't work, the engine sometimes would sound loud when I would first start it, and would I change from drive to reverse or from reverse to drive, the car would jerk hard and make a loud noise. I believe that this is a wiring problem. If it is, I was wondering what you think the best course of action to take would be? Do you think I should take it to a Volvo repair shop? How much do you think this would cost?