Product filter and popup text

1) In the online store, Magento CMS to set a convenient filter products by parameters.

On the page with the goods left side column is a filter products. At the moment the selection of products arranged like this: when you click on a parameter, a list appears - select one option the page refreshes. To select multiple options from one list is not possible. The goal is to establish a good convenient filter: price-slider, color - images, the rest are checkboxes for several settings.

2) to Reduce the visibility of all text on the page

At the end of the page before the footer text to be placed on multiple lines, clicking on "Read more" to open the full text.