They had one son (Eldarion, see appendices) and a couple of unnamed daughters.
As for what they looked like, I'd like to reiterate the point that the Quendi don't really have 'pointed ears' -- unless, in Middle-earth, Men had them too, since they are physically the same. But that is another matter... the search function should help.
Aragorn was, if at all, described as very fair and noble, so I doubt he had 'bad hair'.
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