Welcome! Maintenance isn't expensive, $150 is way too much for an oil change and tire rotation. The car only takes 3 liters of oil.
I've dealt with a few cars with squeaky rear brakes, mostly from dust and gravel. But they all had way more miles than yours.
And yeah, all the cvt's seem to do that. I believe it's the tranny downshifting when it lurches forward like that. I learned to hold the brakes a little harder when stopping.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)