(would add a link but not sure how)
The address for an individual post is contained in the datestamp at the top of that post. So you right click or double-click or whatever you have to do to get the URL.
If you paste the URL into your post, the software automatically makes it into a link.
If you code something, type it inside square brackets. Using the Preview facility, you can see how the software has added a link to your pasted URL.
To make a link on some text within your post, you need two bits of code, each contained in square brackets. The first one says, "URL=" followed by the URL and closing the square brackets. Then type your text, such as "click here." Finally indicate you've finished typing your link text by adding "/URL" - again within square brackets.
To show a quote, just write the word "quote" in square brackets and then, when you've finished quoting, add "/quote" again in square brackets. If you want to say who said the bit you are quoting, just add their name inside the square bracket so it reads, "quote=SoAndSo."
It sounds fiddly but will come second nature after a few shots.
Hope this helps. There's a thread and help file with some examples. I prob haven't even explained it that well as am in bed under the weather just trying to do it from memory.