I am just wondering and curious:

How can i clear my cache/cookies from within my forum. And do you know if my forum and my forum's url would been seen within the internet's search engines. As i can't find it in the google Australia search engine. And hoping my forum will show up without a single ad. Crossing fingers here, so i can get more members.

For cache/cookies, please read this thread:
https://help.forumotion.com/Frequently-Asked-Questions-f5/Clear-the-cache-memory-and-modifications-not-done-t55.htm
But there's no option integrated in the forum to do that.

Here are some tips for your forum to get more members

First of all you want your forum to be neat, and tidy, Use proper
grammar and english, And make it a specific forum, Such as a only
gaming forum, Poetry Forum, etc etc.

Advertise it, Don't Spam
IT!, Advertising it neatly will get you more members, Spamming it wont,
It will make other members mad, And for sure you will get banned.

Kepp your forum up to date, Don't update it every month, Update it daily, wth new forums if required for members.
Make affiliates, On other forums, Doing this is a possible chance of 1+ member's a week depending on the other forum.

Submit your URL!

http://www.google.com/addurl

http://www.search.msn.com.sg/docs/submit.aspx

http://www.submit.search.yahoo.com/