Hi
Thank You. I can see it a little better now
"Undefined variable" notice is nothing to be worry about. It's a common notice since PHP has changed it's standards for codding and lots of the programmers are still using old scripts or the way of programming they used to. Simply disabling showing errors, which is recommended by joomla developers, will do in this case.
Other error is a little different and I would say better to get rid of it, but the number of line was cut in Your image so I cannot locate it. Please just copy paste the last error.