On-Page content optimization?

Do i need to make unique Title and Description for all of my web pages?
Can i copy terms and condition, privacy policy and Cookie Use policy from another website and put it on my website? or do i have to write my own unique content?
I did put 4 press releases on my website and many bloggers copied it to their own website. Will it hurt my website?

from Search Engine Optimization http://ift.tt/1PNZn78
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