Character Sheet Help

Hello everyone, I'm kind of confused upon how to properly do this....

I'm trying to set up an RPG like forum game, by having users create characters. However, I've run into some big problems:

1. I'm not sure how to create a bar field that can be increased with a post count, (i.e. "leveling up").

2. I can't figure out how to make an "if..then" like statement, for example, I have a choice list field in which you can chose to be good, bad, or neutral, but I then in turn want this choice to restrict what classes they can choose in the next choice list field.

3.Finally, I was wondering if there is a way to make text fields that are only editable once, (for example, a character description).

If anyone could enlighten me, just give some advice, or any other kind of help, (even a link to a good tutorial), I'd really, really appreciate it. Thanks for reading this, and I hope I can get past these problems to create a pretty cool forum.

1. They will not automatically gain the Bar for you. (not possible)
2. Just add words in there , and if you go the their profile , and you can modify it.
3. Same as number 2 I think!!

Well, thanks for the help, unfortunately, all things have limitations I suppose .