Need some help please
 

Hello all ive been doing my forum and there is a couple of things i cant work out there probley sitting right in front of me but just cant see it or work it out.

1.The person who got my forum up and going (which i thank) set my user name and password and i want to change it(Im talking about the admin login and password which takes you to the control panel).thanks.

2.What im trying to do is i want people to see my forum but i dont want them to access the posts until they have signed up.(other words when they click on a post it takes them to the sigh up screen) They would be a great help thank you.

I have played around in the control panel but just cant find what im looking for.Geoff