Get the hell OUT. If you can't, hide, if found by any of the threats do what ever it takes to stop the immediate threat to you hit 'em with a chair, bottle, bite their throat out if that's what it takes, but continue to get as far from the center of the action as possible, using anything that comes to hand as a weapon to destroy any one who poses a threat to you along the way. You know you can stab someone to death with a pencil or pen. in this situation remember, humans are animals, act like one. If you are close enough to a guy with a rifle to strangle him, his rifle is of very little use if you think about it, he needs room to get the barrel in line with you, use things like that to aid your escape.
I think Tom is on the mark here. My deal about the food, etc..was to stay out of harms way if things got squirrely I got off the subject...sorry my rant.
First I think maybe rethink what you believe is needed for training. It's not just about we as the head of the house can do but how each family member reacts. Family members need to know to do something productive...which I think, at a minimum, means they need to know themselves how to lessen their exposure, take a look here:
http://www.usshootingacademy.com/viewFile.aspx?id=30 it's a course for the family not exactly on your scenario but I think it would be of tremendous benefit. For instance...you are at the mall, the world goes boom, and a little girl stands straight up in the open in the mall crying with bullets flying...as opposed to dropping to the ground and looking for concealment or cover...big difference and just maybe all the difference between life and tragedy.
Dirgressing again because this is desireable but not necessarily practical for heads of all households to attend....my next inclination to train for your scenario is to train like a protection force:
http://www.usshootingacademy.com/training_course.aspx?id=29 ...this one is 12 days with prerequisites. I couldn't hack it just because I am terribly out of shape.
I think I'm settling on some very basic training for the family. Not to be expert gun handlers, but how to recognize harm using that SECURE protocol that's in the first link or something similar. Next, as head of the house more training for you so that you will know and can "push" that down to the wife, older children, etc. More training doesn't just mean going to classes. For instance, when I go out shooting now I shoot steel or dispersed targets and try to incorporate moving and "getting off the X" like we've seen in some Shooting Gallery shows.
Shooting Gallery has been incredibly helpful for incorporating techniques that really make a difference beyond standing in one place shooting. Heck, when I look back at what I did not know just before I got turned on to Shooting Gallery vs. what I now know just by watching and going to a couple of classes at USSA it's unbelievable what I picked up....I look at my compadres I used to shoot with who haven't done that sort of thing, reflect on their abilities and processes....then I catch a chill just thinking about what I don't know and what I could learn with more training....that didn't come out real well but I think you will know what I mean.
Shoot some IDPA and USPSA for recreation.
But, I also think, besides just moving to get out of the way, to be more complete by learning the things Janich, Rausch, Pincus, etc. teach to include, say, ..... when not to use the gun are what I need the most of...that and losing 60 lbs.
I'm here to learn so I don't mind getting straightened out for having wrong thinking and bad ideas...these are the things I'm thinking right or wrong. So, some of you guys with millitary experience and real life training...I'd appreciate your thoughtful comments on what to do also and where my thinking goes awry.