Bunch o' Questions

[dagoo7]

The more I play this game, the more I find I am confused about certain mechanics and basic item/game progression issues. And obviously, the documentation is spotty at best. So just in case anyone knows and would be kind enough to set me straight on the following items it would be much appreciated.

1. Does trade skill only work for main character? In other words you only get discount based on Boar's trade skill? It doesn't look like it will let Sullen talk to merchants, so would seem party members cant serve as trader options, unless it is based on highest tradeskill of all party members.

2. At what point in the game do you start getting access to heavy weapons? Are smg's considered heavy?

3. Where and/or when can you get lockpicks above beginner?

4. Wth is Robbery mode for and how does it work?

5. When stats appear in green, does that mean you are suffering negative effects of something? If so, how do you know what that effect is?

6. Related to above, how do you know if you have critical? Is it shown somewhere? If you still have debuffed stats after fully healing, do you have critical? Is there someone in Hospital in NC that can cure this?

I'm sure I have got tons more, but these are the ones that are currently driving me crazy. Once again, any input greatly appreciated.