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I believe you are referencing a Norfolk Island Pine.

These plants can grow very large and tall, and often outgrow a home environment. Topping the plant can be harmful to the plant.
I often suggest people donate the plants to schools or nursing homes where they may have higher ceiling heights.

https://www.gardeningknowhow.com/houseplants/norfolk-pine/norfolk-island-pine-care.htm

This is very common for an older Norfolk Island Pine.

They can grow to very large size and often outgrow a home space.

https://www.gardeningknowhow.com/houseplants/norfolk-pine/norfolk-island-pine-care.htm

You didn't mention the available light and that is the most important factor. It should be close to and in front of a moderately sunny window. Without adequate light, nothing else you do will matter much.

Misting does nothing as it increases the humidity for all of about 15 minutes after you do it. Besides, NIP's have shown that they can do well in very dry air as long as they are watered properly.

Water yours thoroughly - until some water trickles through the drain holes - when the top inch of soil feels dry.

This will have to be pruned out AFTER it recovers. It will likely recover, but the shape of the tree will change. Just care for it indoors, and once you see new growth, you can prune away the old.

Here is an article for more information on the care of these: https://www.gardeningknowhow.com/houseplants/norfolk-pine/norfolk-island-pine-care.htm

The best way to tell is to lift the entire plant out of its pot. When the roots start to circle the bottom of the pot, then it is time to replant.

Here is an article that will guide you on the care of these: https://www.gardeningknowhow.com/houseplants/norfolk-pine/norfolk-island-pine-care.htm

There are a few things that you can do, but propping and tying them to wood beams will help straighten them back out. This article will help: https://www.gardeningknowhow.com/ornamental/trees/tgen/straighten-tree.htm