There is no need to bother with images.
You can let us know what is going on by simply typing what you type in terminal right here in the forum. You can copy and paste from terminal right in to your browser.
Anyway. After reading your posts, I decided to take a look at what's in my .bash_profile. Nothing. Nada. The file does not exist. Try renaming .bash_profile to NOT.bash_profile. This should prevent it from being "sourced" when you launch a terminal. You can immediately test it by simply typing bash at the $ prompt. It would go something like this...
$ mv .bash_profile NOT.bash_profile
$ bash
So while I know you managed to get things working, you didn't have to use pico to edit .bash_profile. You could merely rename it so the OS wouldn't find it. I'm glad you "put pico back" though I'm not sure how you did that. You should never go around deleting things in /usr/bin. The terminal is a very dangerous place. You can make your Mac very stupid very quickly by messing things up in terminal. The terminal is a very powerful place. You can customize OS X to your heart's content in terminal, more than the themes, gadgets and various band aids windows users can resort to. So if after hearing how dangerous terminal is you want to use the terminal anyway...
So how do you protect yourself from yourself? If bash asks for your password, think about it. Better yet, ctrl-c out of it and come back later after making sure you weren't about to
\rm -rf * or
while (1) fork.
Take some time and go through a few online Unix tutorials
like this one so you know what dot files are and familiarize yourself with the bash shell and basic scripting. A good book to read is
Learning the bash Shell By C
ameron Newham, Bill Rosenblatt. It's available as an ebook from google for $15, readable in your browser or on any iThing. You can read quite a bit of it by previewing in google books before you decide whether to buy it.