How often was the Ketores burned during the eight days of the Milu'im?
Rashi: Twice daily, in the morning and in the afternoon. 1
As the Pasuk specified in 30:7 (Rashi).
Who lit the Menorah and burned the Ketores on the eighth day of the Milu'im?
Ramban: Moshe - even though he was not specifically commanded to burn the Ketores, 1 he understood that he should, from the Avodos that he was commanded to perform. 2 And it was only once Aharon and his sons subsequently began performing the Avodah - after the eighth dayof the Milu'im - that burning the Ketores and lighting the Menorah were confined to the Kohanim. 3
See Pasuk 5 (Ramban). As a matter of fact, he was not commanded to bring the Korbanos either - only to arrange the loaves on the Shulchan and to kindle the Menorah (See Pasuk 4).
Refer to 40:27:1:1*. Ramban: In fact, Moshe also lit the Menorah and burned the Ketores during the Shiv'as Y'mei ha'Milu'im - even though it is not mentioned.
As the Pasuk specifically stated in 30:7 & 8 (Ramban).
