Canonical URLs for category archives and no follow pagination

Hi,

Thought I’d post this in here as it’s quite technical

My website, like many, uses the WordPress category functionality. To limit the amount of posts shown in one category archive page and provide useful navigation to the user, I use the WP Page Numbers plugin.

However, having multiple archive category pages could cause a duplication issues. Through the use of wild cards I have made sure all Meta titles and descriptions are different, but what I would really like to do is add a canonical tag to point the 1st page of the category. Does anyone know how you can set individual canonicals for each category?

Also, does anyone know how to add rel=”NoFollow” to the pagination links?

Thanks,

Chris