The first photo is of a Vriesea, most likely a cultivar of V. splendens. The second photo is of a Guzmania, not a Vriesea, and probably a hybrid between Guzmania species. Bromeliad species may be difficult to distinguish nowadays, due to hybridization and integration of different species and subspecies, not to mention many different cultivars of each particular species. Determining which genus a bromeliad belongs to is rather simple, as each taxa has rather distinct flower morphology, which differentiates eachother between genera.
The next two plants, going from left to right is Spathiphyllum("Peace Lily"
, and Dracaena, respectively. The exact species of each I do not know, as it is virtually impossible to tell which particular species it is, without being able to see the flower. Most species within each of these groups(Spathiphyllum and Dracaena) are very similar in overall appearance, and differ only in flower stucture. So without a flower to view, it would be near impossible to specify which species you are looking at.
As far as toxicity goes, there is nothing to worry about these plants, as they do not possess harmful alkaloids or other toxins, nor irritating/toxic sap as many other common household plants possess.
I hope this helps a bit, take care and have a wonderful day!
Bob
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