No vacuum enters the cabin, the heat is all electrical. We need to know if you have Electronic Climate Control (ECC) or manual. If the temp dials have numbers, then it is ECC. If ECC, let us know if the recirc and A/C switch blink 20 times after startup (yellow lights).

No heat will be a problem soon. Check between the block and firewall and make sure the hoses are not capped off. Some dummies do that when the heater core leaks rather than spend $40 for a new core (easy to replace).

A 'tick' above the normal range is close enough, but the ECT sensor can be checked with a meter.

Replacing the PCV system on a turbo is not a lot of fun, but only takes one day and lets you give the intake manifold a good cleaning.

For terrible throttle response, check the intercooler piping. Grab each section from the turbo to the throttle body and try twisting it, if it moves tighten the clamp a bit.

Definitely use XC90 or HD strut bushings.
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Keeping it running is better than buying new