I guess if you have a trolley jack then why not. try youtube no doubt a video showing you how to do it as well. But consider how much money you could save by doing it yourself or pay a garage, Funny enough a mate just bought some calliper retracting tools on EBay for £16 full set to do any car.
As far as I'm aware changing the front pads wouldn't require a pad rewind tool as shown above. These are generally only used on the rear calipers and even then not all cars need them.