For the chat room, you should just be able to click on the link at the top and a window will pop up. Log in using the name of your choice and you are good to go. The thing is down at times though - sorta iffy at best.
Smilies - click on the FAQ at the top and read all about them.
Quotes and other goodies not covered in the FAQ, when you bring up a reply screen, click on the "Forum Code" at the left and you will get a pop-up that covers most of the things you can do.
For instance, Turn your text red, bold, and italics or If you make a misteak that you don't really want to delete.
If you cannot see the pop-up, go to the site's homepage and you will see a link to 'the Fishermans Hut' try entering from there.
The only other things that can stop you entering is if you have cookies disabled or sometimes if you have a firewall but that is dependant on the configuration. Try disabling it if you have one then try again.
Finally, if you have some form of screening like NetNanny set, then that will stop you having access.