I need help.

I have searched around but I cant find the answers I need. I am trying to build my website, myself, and i am in over my head but I am going to pull myself out one way or the other! Hopefully you guys will be able to help me here!!!

Anyway, I basically need help on everything but Ill keep it to just a few to start with.

1. I need help downloanding and installing a text editor... and then how to utiliize it. I need to start with cleaning up my website and getting "sales message goes here" banner replaced.

2. I need to know how can I change all my inventory stock numbers in 1 move. I have many products and need up do a "universal update" to quanity.

3. Currently my catagories are only showing 10 pics (products) per page. So if I have 50 models of a particular catagory its going to be 5 pages... how can I make it show more than 10 per page?

Thank you for your help and patience here with me.
Ray

1. I need help downloanding and installing a text editor... and then how to utiliize it. I need to start with cleaning up my website and getting "sales message goes here" banner replaced.
   Google for crimbson editor or notepad++
   Also google for how to use the one you select
2. I need to know how can I change all my inventory stock numbers in 1 move. I have many products and need up do a "universal update" to quanity.
   This will have to be done with a sql statement in the DB
   As referring to the above and your asking how to use an editor
   I belive you should wait for this one till later
3. Currently my catagories are only showing 10 pics (products) per page. So if I have 50 models of a particular catagory its going to be 5 pages... how can I make it show more than 10 per page?
   admin > config > maximim values > Products Listing- Number Per Page