2 customization questions

I’m in the process of setting up my site to make sure this theme will work for my needs and then I plan to purchase the pro version, but in the meantime in order to make sure I can get it setup how I need, I have 2 customization questions.

1) I uploaded some child theme css to change the featured images on the main page to square instead of round and remove the hover but this removed my ability to link the images. Currently the only way to link them is to add a button below the image but I would like to remove that and have the image itself linkable. I’m sure this has something to do with the css but not sure what to change, would someone be able to advise? Here is the custom css I have:

/*remove round divider*/
.round-div {
	display: none;
}

/*change thumbnail size*/
.thumb-wrapper {
	display: block;
	height: 270px;
	width: 400px;
} 

/*change thumbnail size*/
.tc-thumbnail.span4 {
	width: 400px;
	height: 270px;
	margin-bottom: 30px;
}

2) I have my main slider linked to an internal page, but wondering if there is a way to add a shortcode into this option instead of a hyperlink. I have a pop up plugin installed and would like one of those to open instead of a full page when the main slider is clicked.

Thanks so much!