I meant at the beginning and end - forgive the ambiguous phrasing. And, since I'm apparently really bad at phrasing - no, I meant on the board, to see what the problems are. Thanks for the help, though - a ton.

The Nursery has classes for rescued young bit characters, ex-Mary Sues, and badfic offspring both conventional and mpreg. Even post-Nursery Graduation, though, the characters don't tend to be particularly prepared for whatever Department or Division that they are assigned to -- naive may be a bit on the less descriptive side. Agent Oscar came out with a decent grasp of Sindarin, but was surprised that a Suethor would ignore that whole "elves die when raped" thing Tolkien had going on. Marsha's last mission still had her getting a hold of the concept of knees. That might be less an official Nursery Policy, and more just the unofficial policy that a several-ton dinosaur can take whatever disguise (or non-disguise) it wants.

Some rescued adult bit characters often have to spend some time in FicPsych. Neshomeh's work with Agent Ilraen is the most detailed example I've see. You might or might not consider this training, but it can include some technical knowledge, combat training, or other information if those would be part of a normal life experience for someone with the potential Agent's species and cultural background.

Stormsong and Skyfire mentioned at least some hologram training missions. It's not clear if these are typical -- the Queen Anne's Lace is a little kinder to 'her' Agents than the Marquis de Sod or other Flower Heads treat everyone -- but they don't seem commonly described.

Others pretty much just get dumped immediately on another Agent, and this seems the most common path. Agent Ranger spent a half hour in the Department of Personnel dealing with paperwork, got partnered up with someone, and went speeding on his way.

And yet others don't get even that : Agents JulyFlame and Library only had a copy of the manual. They were surprised by the [BEEEEEP] and didn't quite get the hang of the Disguise Generator for quite a long time.

It's rather haphazard, really. It ranges from "here is sword, stick this end in Sue after reading charges" to thorough, intense training that doesn't let any recruits go until they can handle missions confidently and carefully.

Direct quote from the wiki:
"Health and Safety consists of giving new agents a few minutes training with their shiny new weaponry before throwing them at, for instance, rampaging Jedi/Amazon Sues."

...so make of that what you will.
I do know that the Nursery has a day-care-type-thing which trains the older kids up a bit, but beyond that... Well, I don't think there's too much in the way of official training. Mostly the veterans teach the newbies in a completely informal manner, often out on missions, IIRC.

Your other questions I am not so certain on, sorry.