Are contributions to 401k plans subject to FICA and Medicare?

I contributed $500 to my HSA, matched by my employer who contributed $500. I also contributed $1200 to my 402(k). How should these be reflected on my W-2?  Should my wages in Box 1 be less than my $60,000 gross salary? How much should Social Security and Medicare earnings in Boxes 3 and 5 be? What amount should be in Box 12?