Should I give partners in my dept Xmas cards

Should I give cards to partners in my department and buy a present for my supervisor – I obviously don’t want to come across as a brown-noser?

I finally started my Christmas shopping at the weekend and am planning to write my cards out this evening. I’m therefore wondering whether I should give cards to partners in my department and whether I should buy a present for my supervisor – I obviously don’t want to come across as a brown-noser? I’m already planning on getting my secretary something. Any suggestions welcome.