No vapor barrier so moisture is present 100%.

It is also likely there have been numerous water leaks over the past 10 years or more that have further damaged the electrical system by causing unseen corrosion of conduits and boxes, potentially with water penetrating into the conduits and accumulating in low spots.If some/all of the above is accurate, your Board should have been well aware of the condition of the system, especially visible components such as the meter boxes.

I bought a long-distance SFH recently where the main sewer line(clay) had some signs of root penetration.

It might not be a bad idea to have a home inspector check the entire house out for things like: improperly sloped drainage from the house, plumbing, electrical, proper roof installation and flashings around roof penetrations, exterior door seals, etc. 

After inspection over the weekend, our inspector identified signs of water penetration on one inner wall of the basement connecting to the backward, which might be due to the gaps between cement walls/chimney bricks and the wooden siding.

Water that cannot drain sits, sitting water creates moisture, and moisture creates "organic growth".

A vent hood or fan can prevent cooking smells from lingering in the unit and prevent the buildup of moisture and humidity that could lead to mold growth.

various windows would not open wood rot on the deck the extensive growth all over the house (as lindsey mentioned when we saw the property, it looks like the lawn maintenance has not been done in awhile) Basement possible mold evidence of moisture (not a huge concern, but still noted) wood rot amateur repair on the main water supply line (fairly concerning because we'd have to pay a plumber to take a look) Apt 1 Light switch did not work when we visited hot and cold plumbing lines reversed water marks in bathroom ceiling. potential leak.

There's also some moisture on other spot from seeping water in basement. 

The tree’s needles have a wax-like coating that prevents the loss of moisture during winter months.