There are over 1400+ animals on the Endangered Species List in the US (kept under the auspices of the Endangered Species Act of 1973). That's only the animals, and only within the US territory - so not the open seas, or other countries.
There's a strong scientific argument that we are in the midst of an extinction level event, caused by humans. Evolution optimizes a species for "normal conditions" in its area. It does not prepare any species for extinction level events, which entail extreme conditions, rather than the norm. So, being endangered really doesn't speak to the value of the traits animals have in their normal context.
Um... no. That's factually incorrect.
All the great apes (chimps, bonobos, gorillas, orangutans) and several monkey species use tools. Ravens and crows use tools. Otters use tools. Elephants use tools. There has been tool use seen in octopi and dolphins.