Is this mostly inside?

The parking for the aquarium is across the street so there will be a short walk outside to get to the main or IMAX entrances. There are also some outside play spaces for kids, and a seasonal exhibit space in the gardens towards the river (this has hosted their butterfly exhibit, and recently the return of the flamingos). This space also has part of the seal enclosure open to the elements. All of the rest of the aquarium is inside.

Yes, all indoors

Yes

Mostly and there are some play spaces to they have some outside animals as well

Absolutely nothing to do outside but freeze