The tc oil is formulated on strict specs from toyota to cater toyota cvt's, i trust no other oils for my very expensive cvt, i replaced mine after 40k (sump removed) and it took around 4 liters, if you intend to do it yourself, take care because ther is a procedure to follow. Too much oil or lack off oil will harm your expensive gearbox
The agent told me that My 2009 does not have a filter, but the service manual said its there and infact it was there, the filter is expensive, the filter in my situation was very clean so i left it alone, do not clean it with kerosene or any other stuff cos you contaminate the new oil,
Trust me, there is very high pressure in a cvt thus oil is very crucial