V te vremena, esli ty byl dvorjanskogo zvanija, ty obycho/redko inogda vsju zhizn' sluzhil tsarjubatjushke.
In those times, if you were of.noble of.title, you usually/rarely sometimes all life served tsar-father.DAT
In those days, if you were a noble, you usually/rarely/sometimes all your life served the father-Tsar.