I am currently using the Blaskan theme and need to add HTML elements to my pages. I only have a text option, and when I add html to this setting it disappears when I update my preview. I am wondering if I need to upgrade my wordpress account, or buy the theme to make this setting applicable. I also do not have any plug-ins, and I am wondering if I would be able to gain access to plugins if I upgrade.
There is not upgrade you can purchase for WordPress.com that allows for FTP access, plugin installation and editing the underlying php which creates the HTML on the fly for our blogs. You need to hire a web host and set up your own WordPress.org install.
WordPress.com vs. WordPress.org > http://support.wordpress.com/com-vs-org/