Rotors can take a little work to get the old ones off if they stick, otherwise if you have a torx bit that fits, you should be able to do it all yourself in <1 hour.
Blitzen's DIY Here
Basically;
Jack up one side
remove wheel (5 wheel studs)
remove calipers and carriers (2 bolts)
remove rotor (1 locating screw), likely require some help to get it free
new rotor and screw, new pads, reassemble
turn on car and push brakes until stiff
drive carefully and bed in.
I'd recommend using a caliper compressor tool to wind back the piston (to make space for the thicker pads), cost me $20 for one, but then you can keep it.
If you are due or want new brake fluid, follow the Jmac bleeding method, then for the price of the pads, rotors, tool and fluid, you have the tools to do it next time and the satisfaction of having done it yourself.
Brakes are important, don't roll far unless you know you are going to stop with your handbrake if your hydrolic pressure is low as you have not pumped the brakes, fluid has air or something else. I've not changed my rotors, but had the pads out too many times and replaced my brake fluid.
