hello op, do not fear its just one day, with food and a few gifts, its not an insurmountable mountain to climb and you will do it....
I have only skimmed and probably repeating what people say.,
but if you can eek out one or two decent gifts per child....when i say decent I mean roughly what you tink they would like then bulk out with lots of little things from charity shops, xmas fairs in town halls, check out this for your toddler
www.babyandchildrensmarket.co.uk/Events.aspx?CountyID=65
Check this out and see if any markets near you, cost a pound to get in and whislt some people sell and want silly amounts THERE IS ALWAYS AT LEAST....one person there who is there to SHIFT stuff...and get rid for really good rices, you could get some things for her....for very cheap....
I know, i recently sold loads of great stuff at one, for 2 - 3 pounds!
wilksinons have large tubes of sweets for a pound at the moment....good to bulk up stockings with satsumas to.
there is a great tesco toy sale on better prices in shop than on line.,
tk max does great reductions if you live near one, for books and clothes for older dc.
we got last years xmas dinner from wiatrose months before it cost me 13 quid.
also meat counters reduce sauges really well too, i get all mine from waitrose reduced on meat counter.
if you had the time to pop into shop later on, holding back till you see what you want you could easily get joint of meat 75% off....my local sainsburies does massive reductions at 7 pm ish...you have plenty of time to get something really lovely,
bulk out main with potatoes...yorkshire puds?
I honeslty would simply tell all rest of familyt your having a lean year this year, and do token gifts, like the tube of sweets from wilkos for nephews. maybe tk max for your bro....t shirt? scarf?
cut everyone else out. we have done this, we just cant afford to buy for everyone. even dh and i dont give each other gifts.