Artificial tree. No new decs every year unless we have been away somewhere and I have sneakily bought something for DH's stocking! V cute skinny wooden FC last year, went down a storm!
Around £80 on 5yo DS but he also has a December birthday. We got bargains on Amazon on Black Friday.
My niece and nephew about £20 each. DH's niece and 2 godchildren about £15 each. There is a big supermarket near us that has a 3×2 offer on toys every November, so we always go there then.
Other gifts I make: tablecloth and 10 serviettes for DH (as requested!), tree decs for friends (I am pretty good and sell them too). Etc. On adults probably £20/25 max.
DH and I don't buy for each other - oh, except the surprise tree dec and he's getting a can of Guinness in his stocking 
Food isn't an awful lot. Turkey is dull and unappetising. We do salmon for DFil, something veggy for DSil, meaty surprise for us and DBil, bunch of roast veg for all. Starter will be squash soup with glazed walnuts and desert will be a light chocolate cake with chocolate topping to look like a xmas pud! Plus 1970s plastic robin stuck in the top 
We don't buy lots of alcohol (1 bottle for lunch), or nuts and other nibbles- they just make me fatter! We are in Spain and a lot of 'my' traditional food, and things like crackers, aren't available here.
We also don't do any of the following: Elf o/t Shelf, FC grotto, ice skating, steam train ride (a la Hogwarts Express), C/Eve hamper, Xmas bedding, Xmas pyjamas, fancy-ass Advent calendars.... Really the list is only endless if you let it become so.
My Christmases as a child were incredibly pared back, but still so much fun and I have very fond memories of them.
Christmas to me now is all about putting up the decs, Harry Secombe singing from Wells Cathedral (much-loved CD!), crafting with our son, cracking open the Christmas Tea, watch DS playing with the Knitivity
the rest is gravy.