Hi Yash,

1. To enlarge the slider on your homepage you will have to set the slider to full-width or full-screen, for more please check the Slider Revolution documentation and this video for responsiveness settings:

(view large image)

2. Which text do you want to change, the headings, paragraphs or the input text color. Please try to be more informative so we can  give you the proper code for it.

Hi again,

1. Make sure you have set the image to full width from the settings mentioned above, if you can't find that option please include your site  credentials.

To include your credentials click Insert Credentials button in the editor toolbar. (See how)

P.S. With Kalium you will get a free copy of Slider Revolution, this copy does not include support for the plugin and premium premade sliders (read more). 

2. Add this CSS to Custom CSS:

.contact-form textarea,
.contact-form input[type=email], 
.contact-form input[type=tel], 
.contact-form input[type=text], 
.contact-form input[type=url] {
    color: red;
}