Minor Improvements on word press website

General information for the website: Existing Website - requires minor improvements on various pages
Kind of development: Customization of existing website
Description of requirements/features: I have an existing website for my business and I need some minor improvement on the content pages:

1. Reduce the height/gap between lines on all text on all pages - make more compact

2. Reduce the size of the text / Provide different styles / colours

3. Improve presentation on content by under each of the "Services" Pages

I would like to be able to "collapse" / "expand" the text under each heading as the page becomes too long. Perhaps other ideas?

4. Add more text boxes / such as "Client Testimony".

5. Makes sure when browser window shrinks, the wording does not overlap each other. They should always stay separate.

6. Check website is mobile friendly.

7. Add projects pages

8. On the Footer / Social Media - Keep Facebook/ Linkedin/Twitter - Delete the rest

9. Provide more ideas / Improvements for corporate feel

Thank you
Extra notes: Provide a more detailed description to help you get better proposals