I have a Xsara Picasso and it's fine in snow/ice (crosses fingers and hopes she's not jinxed herself!). My dad always said that if you can, you should set off in second, or get up the gears as fast as you can. I get up the icy hill out of our estate just by putting it in second and letting the engine struggle. Don't over-rev it.
Alternatively, pay someone with a 4x4 or a tractor to tow you out! Kind of defeats the object of the temp job, though, don't you think? Good luck.
Don't panic, you've got until friday. Perhaps things will have improved by then. Are you a member of aa/rac/green flag? Don't know if they can tow? Or contact local garage or something? just to know your options in advance?
I don't know what to suggest really. I feel for you, I got stuck at work the other day on a pretty gentle slope. Thankfully, it's a hospital and they cleared the snow mid morning so I was just late home after a night shift.
I was told to find the virgin snow because you will have more traction. I thought I was going to get stuck on a hill on the way into work and pulled over, trying to park and managed to get going again in the fresh snow.
I hope you find a way to get out. Snow is a nightmare
high gears, low revs according to my DH (current broken leg so am doing all the driving and he is back seat driving!). Am going to give up the day job and join the cast of ice road truckers when this is all done!