Locked Out! 2001 x5 4.4

[inkedgirlq]

To stupid to be true but it is and I'm freaking out! My x5 is sitting at the mechanics waiting to be picked up. My fobs no longer work and my driver side door has a broken mechanism right now so it only opens from the inside. Well out of the blue it got real cold where I live here in NY and now my battery is dead. Can ANYONE help me? Ow can I get in my vehicle w/out breaking a window or buying a new fob? Is there a way to jump it and start it from outside? I read that was a possibility? I also read there was a way to get in thru my tailgate. Sorry this is so long but if I can do this myself I would like to.