€100-120 on gifts for DS.
DH and i do not exchange anything big, usually books and something free-time related (guitar thing for him, sewing shizz for me). We can buy what we want durung the year so do not bother at Christmas but i think it is important DS sees us exchange something.
We do not buy for others at xmas, but we do buy decent stuff for birthdays throughout the year, so not totally miserly. DS has a December birthday, nephew a January birthday, plus DH has 8 niblings - we just get a bit wiped out! We do go away for 3-4 days over DS' birthday (big holiday here).
We don't buy new decorations every year, apart from one new bauble/trinket for the tree. Usually bought during DS' birthday holiday - we love seeing them come out every year.
Christmas day is the 3 of us. We may entertain over the Xmas period and we'll do something big for new year with some other families. So entertainment probably another 100€.
There isn't panto here, or Santa Express or anything like that. There is a big Kings Parade on the evening of 5th January where the kings throw boiled sweets at kids from floats. For free.
Our Christmas is pretty pared back but we decorate, have an advent brunch booked next Sunday with a German friend (they go nuts about the 1st Sunday in advent, it is wonderful!). My family are spread out over the globe, DH's family are 'complicated', so it is the 3 of us plus friends for the Christmas period.
Wow that was long and pretty waffly 
To answer your question, it looks like between 3-350€ all in for Christmas.
Can i put my tree up yet...?