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You may need to repot your plant and use a good commercial potting mix. Choose a pot that is just one size larger then the existing pot.

https://www.gardeningknowhow.com/ornamental/foliage/coleus/growing-coleus-in-a-pot.htm
https://www.gardeningknowhow.com/ornamental/foliage/coleus/overwintering-coleus.htm

Yes, they are toxic to all housepets, and ruminants. Make sure to keep these out of reach, or worst case scenario, out of the area completely. All of my toxic plants were relocated prior to my children being born, and believe me I had some gems. Better to be safe then sorry, though.

Coleus prefers shade and their colorful leaves will wash out if receiving too much sun. They also like some moisture. The new leaves look fine which leads to too much sun as the culprit and not some disease or water problem.

Most cultivars produce, both male and female blooms. This article will help: https://www.gardeningknowhow.com/ornamental/foliage/coleus/coleus-plant-blooms.htm

Over the years, hybridizers have simply been crossing the top-perfoming coleuses together and keeping the best for further breeding. Genes for self-branching and also delayed flowering have become the norm.
Thus, you no longer have to pinch or prune most modern coleuses: they grow perfectly without your help.
Some varieties are not as “advanced” as others and begin to bloom early, in August or even July.
Pinching off coleus flowers is a snap: just squeeze the spike between the thumb and forefinger until it comes free. Or cut it off with pruning shears. It only takes a second.

This is actually a Bromeliad plant.

This plant only blooms once, and it may produce a 'pup' that can be propagated.
These links will help you.

https://www.gardeningknowhow.com/houseplants/bromeliad/growing-bromeliad-plants.htm
https://www.gardeningknowhow.com/houseplants/bromeliad/watering-bromeliads.htm
https://www.gardeningknowhow.com/houseplants/bromeliad/growing-bromeliad-pups.htm