I am in the process of moving, and found my old collection of Star Trek cards. No idea when I actually got these, it was mid-late 90s, and I have the majority of the 120 cards I know about (as well as some bonus cards)
This is card 001. It comes in English, with 5 (01A-01E) extras in other languages.
They come in various flavors, hilighting important cast, crew, characters, ships, etc.
Honestly I can't think of a time she wore a uniform color "tight" outfit. It might just have been for promotional material, or during a special episode because the only times I know she wore uniform colors was after Jellico ordered her into a uniform.
Troi wore a uniform in the pilot, also, in the form of one of those "skant" tube dress things which mercifully got phased out quite quickly. Both that and her standard uniform were the blue/teal med/sci color, not red for command.
I can't find any source for this, so I am just making it up: It would not surprise me at all to learn that Troi was originally supposed to wear red at some point during character development but this was probably changed to offset her visually from the other two red command uniforms she'd be lounging around next to all the time. She did have a cranberry unitard thing at one point, but never a bright red one like this, at least insofar as my limited nerddom allows me to recall.
Methinks this promo shot was doctored significantly anyway (I mean, look at Wesley's face). Some goober probably just grabbed Troi's dress with the old lasso tool and started messing with the channel sliders. Why, though, is anyone's guess. (Worf is rocking his chainmail sash thingy and Riker has his beard, so this has got to be at least post season 2.)
They’ve brought them back (forward?) for Strange New Worlds, some male background characters can be seen wearing one. It’s basically the same thing as the uniform style Una and Uhura seem to prefer, just tailored to a male body shape.
It’s gotta be season 3. Crusher wasn’t in season 2, it was the year of Doctor Pulaski. The high collared uniforms weren’t introduced until season 3. Wesley was promoted to a full ensign at the end of season 3, so he’d be in a red uniform for season 4, and written out by 5.
He's in the headline image OP posted. Not on the card backs in the post body, which replace him with Guinan. Depending on your client you might have to expand the main image to see it via clicking on the thumbnail or similar at the top of the post.
I've never seen it before. I think you're right that it was promotional material only, but clearly not all of them. I had a TNG lunchbox when I was in preschool (basically a nerd since birth), and even on that she's wearing the "cheerleader outfit".