Im not a web programmer by trait more of a designer but I had a website kinda fall into my lap at work and need to fix it up a little bit.

It has decent bones but the way it was coded I have to edit each indiviual page when i want to change something.

Couldn't I just do this through a css page somehow?

The website is cummer no space obviously. I would like ot add a logo on the header bar as well. There is also very slow load times with the javascript pages any suggestions?

I understand a lot coding but I can't seem to narrow everything down. Im doing a lot of copying and pasting to get pics added but there has to be a way for me make changes on a central page vs now I am doing it for index, contact, about, equipment etc.

Please any help would be very much appreciated.