car sitting in the cold = problem??

[eastcoastS14]

ok so heres the deal bought my s14 not that long ago but when i bought it the guy couldnt find the keys so i only have keyless entry remotes the car has been parked in my driveway and i never bothered to register it because i live in MA and assumed it would snow so i figured i would wait and drive it in the spring the problem is that its been cold and i believe the battery died which makes it impossible for me 2 open the car cause the power locks are powered from the car battery...now the car is just sitting ther and i cant get into it to start it...i would normally just call AAA to open it but they wont touch a car that isnt registered. should i be worried about the car just sitting there? the car has an SR20 with a bigger turbo plus a lot of other stuff and i am worried that the things might start to clog or corrode inside the engine from the changes in temp and lack of being started....any insight to whether i might be in trouble here for letting it sit? or should i not worry about it