Recently active topics in Wordpress about WordPress Self-installed

I'd like to customize my CSS with a template I found. The template requires that I ftp its directory tree into the wordpress directory of the site, but the only customization option I found is a form entry. Is this the only way to customize CSS? What about the custom images that go with CSS templates?

Is there any way to mitigate the effects?

I'd like to launch a new site, and I don't want to spend very much, and I'd like to do it on top of Wordpress. How can I find someone to help me?