JelZe GoldRabbit wrote:Armada, Energon, Cybertron: None given, but Primus makes a return, and Unicron of all people created the Mini-Cons)
It's mentioned that they were sent out into the universe
by a "unique digital entity". If memory serves, the Ask Vector Prime section in one of the AllSpark Almanacs says that was Primus as well, and they refer to him multiple times as "the creator". So it's Primus there too.
And to add on to your list, it seems that the Prime/War for Cybertron/Exodus continuity has Primus as their creator, with the AllSpark as the thing that he used to make them. The Quintessons are thrown in for good measure, but seem to have enslaved them rather than made them.
But regarding their actual lifespan, I'd say that they're probably biologically immortal, meaning that they can't die of old age, only when an external force kills them. Vector Prime, for instance, has stated that he's
nine billion years old, in other words, almost 3/4 the current age of the universe. (Well, our universe anyway)
Despite this, they seem to show signs of aging in almost every continuity, so it seems like they might have some sort of lifespan, but if they do, it's probably so absurdly long that it would seem like forever. Then again, old age might be more a matter of mindset than physical age, especially considering that Unicron seems to be portrayed as old in Transformers Prime, and I'd have to imagine with his given background that it would be impossible for him to pass away from age.
JelZe GoldRabbit wrote:One piece of advice: please keep every continuity, meaning timeline, separate unless you want this to happen:

Every few years it gets reset, or rather, a new one is created.
Well, that's not entirely being truthful, since it has been stated that Primus exists across all continuities, and presumably created all of the Transformers in some way, shape or form. However, it's so lightly touched upon in fiction and such a confusing and plot-hole inducing concept that most fans are more apt to ignore it outright. There have been at least one or two stories crediting him with creating the G1 cartoon Transformers if nothing else.
Personally, the plot-holes don't bother me, since there are so many of them in the series, what's a couple dozen more? But I'd imagine a lot of fans don't think like that. But alas, this thread isn't about that can of worms...