Newbie question about bringing fish into aquarium
 

I started my first pond and live in Canada. The leaves are dropping fast
and soon it will be well below freezing. My pond is about 1.5 meters deep,
but that will freeze solid by mid November here. I have a 75 gallon tank
which I hope will hold my first year fish consisting of 3 gold fish and 1
koi.

I was wondering if the tank would be of sufficient size and I do not know
the procedure on how to prep the aquarium. Do I use some of the water from
the pond to get the aquarium started? Do I cycle the aquarium for a period
of time?

My family has become quite attached to the fish and we would surely hate to
lose any.

Thanks for any advice.