Both moves are unavailable in Gen VI.
The only way it can learn both of those moves is as an Eevee in Black 2/White 2, from the Move Tutor. So yes, you will need Black 2 or White 2 to get a Heal Bell/Hyper Voice Eevee.
As for your second question, there is a good chance they won't state what moves the Pokemon has, but if they happen to do so in the rare occasion they might just simply say 'Heal Bell' or 'Hyper Voice' in the description.
Hope I helped. :)
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