They are generally called "Drop bars."

As for that bike....it's definitely a budget bike, and the commenters on Target's site say the tires kept going flat until they replaced the tube and or the wheel, so buyer beware.

The main issue you'll have with a Target bike is that it likely wasn't put together well. The components and frame etc will all work just fine...if they are assembled properly.

You might cruise Craigslist if you want a bike that has higher end components but is likely a few years old.

As for mirrors, you can always get a helmet mirror. I chose a straight-bar bike so I could plug a mirror into the end.