Hi, meeda-
You can use the Text/HTML module for that. 
 
For the welcome message, enable token replacement in your Text/HTML module settings and use one of the following tokens for the name:
  
   [User:FirstName]
   [User:FullName]
   [User:Username]
  
 
For the "Log Out" link simply drop in the same javascipt call that your skin's "Logout" link uses:
 
    ( __doPostBack('dnn$dnnLOGIN$cmdLogin',''))
 
 
You have a couple of choices when it comes to the profile information:

1. One way is to simply provide a link to the USER module using the following script:
    
      __doPostBack('dnn$dnnUSER$cmdRegister','')
    
2. A second option is to provide user profile data directly in the Text/HTML module using tokens just as you did for the user's name in the welcome message.  This is especially useful if you want to show profile information in a read-only format.  One list of tokens can be found here:
    
   http://www.dotnetnuke.com/Resources/Knowledge/DotNetNukeOnlineHelp/tabid/787/TID/2761/cid/-1/Default.aspx

Cheers!
-mamlin