If you want to do this project yourself you need to buy one of these.
Mityvac Hand Vacuum Pump Kits
I have the cheapest on that is just a hand pump without gauge. This way you can drain the brake fluid into the container under the pump and see what condition the fluid is.
Just place wrench on bleeder, start pumping to create vacuum, open bleeder and continue pumping, shutting off bleeder once you have pumped out an amount of fluid that is smaller than your reservoir. Just remember to remove old brake fluid in reservoir BEFORE adding new fluid to reservoir and then drain lines; that way new fluid is instantly going into the system.
I just did my 07 Altima this afternoon and just love my pump, as you're not yelling.....RELEASE, PUMP, HOLD....repeat a hundred times.