is the transcription factor NF-Y the same as NF-kappa?

Answer 1

No they are not

NF-KB swissprot accnumber P19838
http://srs.embl-heidelberg.de:8000/srs5bin/cgi-bin/wgetz?-e+[swissprot-acc:P19838]

Active NF-kappa-B is a heterodimer of an about 50 kDa DNA-binding subunit and the weak DNA-binding subunit p65. Two heterodimers might form a labile tetramer.

NF-Y:
NF-YA, B, and C comprise the heterotrimeric transcription factor known as nuclear factor Y (NF-Y) or CCAAT-binding protein (CBF).
See http://ca.expasy.org/cgi-bin/get-sprot-entry?P25208
for the B-subunit (and from there for the others)