I am not puting up every single script of existence, just the common "essentials". ----------->
I will save myself the lecture and just throw scripts up. All the info you need can be found within some of the pages I archived:
How To Use (being as breif as can):
-Open 'autoexec.cfg' with a text editor like Notepad. Edit: Since 2013 userconfig.cfg is the new autoexec.cfg.
-Located 'C:\Program Files\Steam\steamapps\ACCOUNT\team fortress classic\tfc'
-Copy & paste script(s) into it. And replace 'bind' X with the key of your choice, obviously.