Heh, heh, someone thinks they have a steal of a deal.......
Okay, you can't tow it backwards as the rear frame won't take the stress and the tow trucks lifters won't reach the drive wheels ahead of the tag axle, (don't even think about lifting it with the tag axle!).
You can't tow it by lifting it up at the front as it will bend the tag axle and do some real damage. The only option is to low-boy trailer it. Depending on where it is in Canada this will be expensive; however on the bright side, with the exchange rate being the way it is, better to have a Canadian company do this for you.
Now, getting her across the border maybe tricky and I'd suggest you talk to US CBP for the correct info, as you are now importing a vehicle into the US.
The very best and cheapest scenario is to have her fixed in Canada and drive her home. You have to fix her anyway, and like I stated earlier, the exchange rate will help you immensely.
PS Just looked up and found the ad....
I'd get her fixed in Canada and drive her home, if its just battery cables and a new front chair.