-where i can find articles which have no copy write and i can use them ? -can i put articles in my pages with putting writer name and site name ? (then adsense is ok?) or we can not use some one else article at all ?
You have to first read the terms on any site you want to use their articles. Some allow this. Having said that, if you think creating a site full of copied material (allowed or not) is firstly, allowed by Google, and secondly going to earn you an income from it then you are sadly mistaken.
Where i can buy niche ready to use and legit with good cpc ? i want a lots of best niches for adsense and user friendly
can i copy from squidoo.com by putting writer name on my pages with © symbol ? where i can buy adsense ready niche ? (legit)
It doesn't on the article directories. You can find people to write them for you. Fiverr or outsourcing.
yes fiverr is good, I've first started using it yesterday night. Not for article but for video testimonials, in fact just to have videos of people talking about my site. I've bought over 30 of them and I'm waiting for them to arrive, I already got 5 in a few hours. As for your question, you're clearly still in the wrong mindset to start digging the goldmine that is your adsense account. Original content is the main tool you need to dig gold. Otherwise you'll be digging with your bare hands.
Friend, forget about duplicate content. If you can't write outsource it. You also risk your Adsense account with copied content.
Go to Google and under "Advanced Search" click on "Date Usage rights" and select "free to use or share, even commercially".