Unfortunately this isn't possible. You will show up in their "followers" list.
No. Everyone that is following you will be in your "Followers" list. However, if you do not have a protected account then anyone can view your tweets without you knowing. When you have a protected account you must approve who can follow you.
190,000,000 people follow Twitter.
By tweeting them and asking them to follow you.
Go to their profile and click on the 'Follow' button. You must be logged in to Twitter.
Tell the people that follow you to tell the people that follow them to follow you . Make sense? Follow Friday is a good way of getting new followers. Its also good to provide valuable content on twitter and become involved in the twitter community by interacting with other twitter accounts.
You can tweet someone even if their account is protected.
No, but I am aware that some people follow others on Twitter.
If you both have a Twitter account and you know what their username is then yes.
To be updated on what they write.
Follow me on twitter @Shinainai_69
@MrsGet_YouRight @BlackStewie
Those people who do not share interest with you.