Firstly you can go for engine oil 5w-30 or 5w-40... get good brand liqui moly, Mobil one or kixx.
Second , go for original cvt oil by Toyota. You can get this from any car lubricant shop.
Third, vitz has EPS so no need of steering oil
Last, get your disk pad check and also do brake service ... the noise will disappear.
Buy stuff from outside but get your car maintenance from Toyota 3s.
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