The A/C and the power steering noise may be related to a low idle when cold. Both use the engine to operate, and the IAC is supposed to compensate for the load by increasing engine speed, and also supposed to raise the idle when the engine is cold to avoid stalling.
You can clean the IAC by removing it and flushing it with spray cleaner.
If you plan on adding power steering fluid, the lower line on the reservoir is 'COLD' or room temperature. The upper line is the expected maximum level to be reached when the power steering fluid has reached operating temperature. Do not overfill it when it is cold, or you will have PS fluid dripping down the side of the reservoir.
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