If you have someone who wants to get started with shooting, point them to a 22. If they want an "evil" gun, point them to an M&P15-22.
When it comes to defensive guns, yeah, I'd start by pointing them toward a handgun first and tell them that Obi-Wan Ken Hackathorn recommends that you have five magazines for your handgun as a minimum - and you're more likely to get them to reach that number than ten. Most newbies think that even five is high and ten is plainly excessive. The exact handgun is not, IMO, a big deal. Glocks are good, obviously, but if they have more interest in a Beretta, SiG, H&K, XD, 1911, or a wheel gun - even a single-action wheel gun - that's fine, too. I would rather they buy a gun that they're interested in, that they like, than that they buy a gun they don't like or don't have much interest in - they're more likely to shoot a gun that they like than one that they don't.
Once they have that down, then point them onto long guns. And long guns are going to depend on what they can spend: Yeah a Colt or a BCM is a good option and if they want to swing the money for a Noveske, Hodge, KAC, RD, Tavor, AUG, whatever, so much the better. But if money's tight, I don't think there's anything wrong with a Ruger AR-556 or a S&W M&P15 Sport - or a WASR, RAS, or other inexpensive AK, provided they have someone knowledgeable along when they go to buy their cheap AK, or buy it from somebody who inspects them before shipping them, like Atlantic. Make sure that they're squared away with good irons and let them do whatever for optics - so long as they keep the good irons, they'll always have the irons if they need them. And Gabe Suarez's recommended five magazine minimum (which should be easily attainable and fairly inexpensive, and if they have a chest rig, they're probably going to want to have enough magazines to fill it up and have one in the gun). If money's really tight or they don't like carbines and rifles for defense, point them to a Mossberg 500 or 590 - or a higher end gun like a Benelli M2 or M4 if they can spend the money and they just don't like carbines and rifles for defense.
If they went with the shotgun, I'd start pointing them down the path of surplus bolt-actions. $600 for a Ruger AR-556 might be right out, but a $300-400 piece of military history might be attainable - thinking of a Finnish Mosin-Nagant, a Combloc M44 MN, or a Swiss K31, here. Somebody who might turn their nose up at a $600 AR might not object to spending $700 (or more) on something like a K98, M1917, or M1903.
I don't think the advice to point newbies toward a Hi-point carbine is bad advice. But I think if we're concerned about organizing a community defense force, a group of lightly trained, like-minded people armed with a combination of bolt action hunting- and military surplus rifles, hunting and defensive shotguns, lower-end Kalashnikovs and ARs, plus handguns - even the odd cowboy gun shooter, with a pair of single-action wheel guns and a lever rifle in 30-30, 357, 44, or 45 - formed around a more highly-trained corps of individuals equipped with BCMs, Colts, Glocks, &c. and more specialized weapons would make a formidable foe for smaller, more poorly organized groups or larger, unorganized mobs.
The bigger problems are going to be teaching them to communicate, move, and apply combat medicine, IMO. And these are things that you aren't likely going to be able to train them in before a problem occurs that forces you to mobilize your community defense force.