A parsley plant and two basil plants walk into a bar...?

Okay, they're not walking into a bar, they're growing in a kitchen and maybe getting transplanted to outdoor containers in what looks to me like USDA zone 6b, but it does sound like a joke, so stop me if you've heard this one:

I have two basil plants and one parsley plant in my kitchen. All plants are from Giant (more on that later). One of the basil plants has gone to seed (not on my watch, I wish to add), whereas the other has been continually in my custody and thus has not, AFAIK, gone to seed. I am not certain about the parsley. More on that later.

Now this is where it gets complicated, because I just got some tomatoes, which are in containers in the backyard. I want to move one or more of the kitchen herbs out to live with the tomatoes now that it is nice out. I was thinking of putting the new basil there and/or maybe dividing it, but I don't know what to do with the old basil or the parsley.

I have an idea but I don't know if it'll work even in the long-term (i.e. new plants in the spring). I think I want to put the old basil plant, the top layer of the old basil plant soil (which will contain any germinated seeds generated by the old basil plant in the aforementioned flowering), and maybe some cuttings from the new one, into the oversized container. (I may not have mentioned this, but I'm kind of new to gardening, container or otherwise).

The problem with that is I don't know if the old basil plant is at all fertile because everything I have bought at a grocery store in the last few years has been sterile (after seeing Food Inc., I have very strong suspicions as to why, but I digress). I also don't know how a basil plant from a grocery store that has been indoors its whole life is going to fare outdoors, or how a basil plant that has gone to seed will do with being transplanted. As I said, some of my questions are likely to be basic.

So, would be pointless to try to transplant the old basil plant? am I just being sentimental because I don't want to kill the first houseplant I've managed to keep alive for a respectable period of time. I would rather put it out to pasture, so to speak, and given the unruly nature of my backyard, I will just plant it there if I can't do anything else, because I'd rather have wild basil growing there than grass, which is boring and inedible (yeah, I don't get the whole lawn thing).

Should I put the old one in the container, buy another new basil plant, try to grow a plant from cuttings, or what? Also, what do I do with the old plant?

As for the parsley plant, I'm not sure what to do. It has started to look somewhat neglected and has very long, pale lower stems like the basil plant that has gone to seed. Does parsley go to seed? I wonder if maybe the lower stems of the parsley plant were deprived (like, there was a shadow over them) and it just put out leaves where there was more sun. I am completely new to parsley, so I haven't a clue.

Sorry for the wordiness-- I know it's bad writing. I have at least tried to break up the wall of text for greater readability.