I've honestly never felt comfortable at the Running Room. There are a few other places you can go for good shoe fittings - Strides in Marda Loop and Gord's in the NW (19th St NW I think?) My friend loves Gord's because you can take them outside for a run even, and as long as they're not muddied and such, you can return them.
I tend to use the same shoe for treadmill and outdoor running - I tended to keep the treadmill for winter use, outdoors for summer.
Download the Couch to 5K program - there's a ton of podcasts if you want to run with timed music. It's a great starter resource that eases you into running. Don't try to go all gung-ho off the start or else you'll likely just get frustrated and quit.
Have fun!