The Estonian Union for the Protection of Animals (EUPA) said the wolf had low blood pressure when it arrived at the veterinarian's office, which may have explained its docile nature after the men carried it to their car to warm it up.
Probably not, no. Wild wolves tend to have only negative interactions with humans and thus instinctively consider them a threat regardless of the specific situation..
It's true that wolves are more intelligent than given credit for and that they're much more afraid of humans than vice versa, but you're not going to befriend a wolf and engage in physical interactions without months of preparation. They treat us as larger predators, and will struggle to avoid being eaten.
While wolves can cause fatal injuries, they rarely do. From 1952 to 2002, there were 8 deaths in Europe + Russia, and 3 in North America. Most wolf attacks occur in south Asia, due to rabies.