The black and orange one that you think is a P1 actually might be a P2. I'd have to have a closer look to tell for sure, but I'm almost positive it's a P2. Most P2s say "Tamagotchi" on the shell. Also, it looks like the background has a "wavy" (rather than "checkered") look, another characteristic of a P2.
The Connections without antenna (except for the blue one, but I'll get to that in a bit) are most likely V2s. Again, I'm not 100% certain because I'd have to know what the game play is like to be sure (V1s have 2 built-in games while V2s will have up to 4 built-in games, for example) but V1s typically have plainer shell designs (solid colors, not many patterns/designs) than V2s.
The pink one that has words in white speech bubble-looking designs all around the shell is called a Mesutchi Tamagotchi. It's actually one half of a pair: the Osutchi is the "male" and Mesutchi is the "female." If you keep looking around, you'll find its blue counterpart. Here
is a picture of the sets (Tamagotchi Planet is another great site for vintage Tamagotchi information, by the way). Anyway, Osutchi and Mesutchi are kind of like the precursor to the modern Connections, which "communicate" (and are also mateable) via infrared. If you notice at the top of your Mesutchi egg there, the top looks like it comes off. It does, revealing jagged edges that you can use to physically connect the top of the egg to the Osutchi. Once connected, they can mate and carry on for a few generations. If you're interested in checking it out, I've run my Osu/Mesu pair in my log, starting here
The blue one with the green guitar pick attached to the keychain is a Music Star, AKA V6. I have that exact same design and have also given it a go in my log, starting here
. As you could probably tell by the name of the Tamagotchi, it's music-based. You raise your character to be a member of a band and they play in concerts and competitions to make money and become the best band there is out there, things like that.
Looks like you've acquired a fantastic lot! I hope you have fun with them! Also, welcome to TamaTalk!