I (and anyone) can see when a post was "handled" last (edited, answered,...) but I'd prefer to also see when it was first created. (Obviously, I can do that by simply opening the post, but then it is already too late, you little exhumated attention-stealing post, you :-) Even Windows (gasp) has a "Created" attribute that could be shown in the files viewer (and be used for sorting), on Reddit I always sort by date - is there a possibility to do this on SE too? (I'm not that long or frequently here, and didn't check all features yet.)
The homepage sorts on activity ("last handling") by default, but the list of questions has the option to sort on newest questions as well, and it shows the "created" attribute you're looking for ... but only for questions, not answers.
As you noticed, you have to go to the Q&A page itself to see when the question and answers were created. There's no option to change this; one of the reasons is that the list pages are cached and shown the same way for everybody. Therefore, they are not customizable.