I have a 2001 Oldsmobile Intrigue and all at once the Radio, Clock, Cruise Control, Map lights and windows stopped working. I tried changing the fuses but that didn't help. What do you think would be wrong with it? and how much do you think this would cost to fix all of the problems?

Checked them they aren't burnt out

Intrigues are infamous for electrical problems. My mothers has had intermitten turn signal, driving light, parking light malfunctions since car was purchased used. Do you remember if you tried plugging anything into the lighter outlets when this all happened? A lot of times those are wired with all sorts of other systems. Check lighter socket fuses.