Questions to which I have been unable to find answers:
1) I can whisper, and send messages to the zone but am unable to send any text to the world, although I do see messages from others on world. When I attempt to send I get:"Lack items for transmitting system channel." How do I broadcast on the world channel ... what is "missing"?
Megaphones, which are an Item Shop purchase (using RL money) are needed to talk in the World channel.
2) The Wiki says pets are only cosmetic, however I have read a number of posts to the contrary .. which is it and if they help then in what manner?
Portions of the wiki are out of date. It is, after all, user supported. There are three types of pets. First, there are the "cosmetic" ones, which are there for looks--they otherwise do nothing. Second, there are Warden pets, which can only be used by Warden primary characters. Third, there are "egg pets", which come from eggs dropped by captured Magic Cavies. There are at least two or three user-generated guides on the forums about these pets.
3) Why am I see all these scrolling and in the world channel messages about not buying gold??? I haven't tried to "buy" any.
This is a general warning that is sent out periodically. You're now aware of it, but ignore it at your peril. Rather, at your game account's peril.
4) I have not found any explanation of XP, TP and training points. I need one that also delineats their differences and how they are used.
XP (experience) is what you gain for killing monsters and completing quests. It is used for raising the level of your character's class(es). TP (talent points) are used to raise your character's skills. Some skills can be raised to the character's maximum level, some have a level cap--usually level 50, and some are passive and cannot be raised at all. When you gain TP, it is usually 10% of the amount of XP gained. There are events and items which can modify (raise) the amount of either XP or TP that you gain for killing mobs or turning in quests.
5) What is the ROM definition of a skill?
Any attack or buff that your character can perform is considered a "skill". Note that at higher levels, there are gear (armor and/or weapons) which have an Item Set Skill. Those skills require a specific class and level, and cannot be raised with TP.
6) If a skill is a function of XP raising a skill to the level that activates a skill then what purpose would any other type of "points" serve and how would they be used.
XP raises your character's class level. TP raises that class' skills' levels.
7) I have spent many hours reading the official ROM manual, reading message board posts and seaching the internet for ROM info prior to DLing the game. For such a popular game, I have found very little outside info ... for instance I have not found a single official or unofficial character development guide ... are their any anywhere??
There are no "official" character development guides. It's up to you, along with other players, to discover how to develop your character and play style.

Lastly, why does this forum keep logging me off, by the time I have composed a post I must log back on! Yes I take my time choosing my words.
You must be logged into the forums in order to post. You may have not noticed a little checkbox and caption next to it--"Remember me". Find that checkbox and, well, check it. Every time you come to the forums, they'll remember you and you'll be automatically logged in.
TIA to all helpful respondersr