In the morning he would put on clothes made of Pilusion linen that was worth 12 manos. In the afternoon he wore Indian linen that was worth 800 zuzim according to Reb Mayer. The Chachamim say he wore clothes worth 18 manos in the morning and worth 12 manos in the afternoon.

All this was purchased with money from the public treasury. If he wanted to add more, he can of his own money.

Yuma 3:8

The cohein would then come to his own ox that was standing between the Ulam and the mizbaiach with it’s head toward the south and it’s face facing the west. The cohein would stand to the east, facing the west, place his hands on the animal, and confess his sins.

This is what he said, ‘ I plead to you Hashem; aveesi [I have transgressed on purpose], pashati [I have transgressed with intent to denounce ], and chatasi [I have transgressed unintentionally] before you, both I and my household. I plead from you Hashem to forgive the avonos, pishaim, and chataim that I have committed before you, both I and my household, as it says in the Torah of Moshe your servant, I will atone for you on this day.’ The people answer ‘Baruch shem kivode malchuso liolum vaed.’ [Blessed be your kingship forever.]