These are things you can set in the User Control Panel. Look up at the top of the page .... you will see our logo, and a box under it showing where you are (and on the right a box that should say something like "Welcome, Jamie101" - below that will be a line of links you can click on ... click on the one that says User CP.
This will open a new screen - in the left-hand column of the screen you should see something that says Control Panel. Below that - you will find the controls you need.
Click on "Edit Avitar" to upload or change your avatar (what I assume you mean by a profile picture). Your avatar must be a GIF or JPG format graphic file - and can not exceed 80x80 pixels in displayable size, nor can it be larger than 64Kb in file size.
When done - just click on the "Portal" button (to the left of the "User CP" button) to get back to the opening page.
If you have any problems with either of these - send me a PM and I'll help walk you through it.
"It ain't what you don't know that gets you in trouble. It's what you know for sure that just ain't so." - Mark Twain