Most likely.
No
Pleco's are tropical fish, so if your pond has a sub-tropical temperature, the pleco will not survive in the pond for very long.
Pond fish survive winter by slowing down their metabolism, seeking out warmer water at the bottom of the pond, and relying on stored fat for energy. They may also hibernate in mud or under ice to conserve energy.
Pictus catfish are a tropical species and will not survive in an outdoor pond unless you live closer to the equator. If you live in the continental U.S., the only place it may be able to survive would be in southern Florida.
carp or koi can survive freezing over winter. But as for tropical fish most hardy central american cichlids do well over summer, as well as danios, barbs, white clouds, and especially livebearers.
If you are asking if they can live in a cold outdoor pond than the answer is no. They come from a tropical climate in South America and are not meant for water below about 72' Fahrenheit (22.22' Celsius).
No they will not survive the winter in most any place in the US if they are outside. They prefer the water to be from about 72-82 degrees Fahrenheit.
OH fo sho. They are very rugged and can handle anything that comes their way...inlcuding a puddle in Japan (which is where they originated...look it up).
Three types of forest populations that could not survive in a pond ecosystem are monkeys, ants, and birds.
If the water is likely to freeze, then I would definitely bring it indoors.
It probally hibernate because it is natural to do. depends where you are located.
An outdoor pond is appropriate for a terrapin because it is a suitable habitat for them. Terrapins are best suited for shallow ponds that are less then three feet deep.