Can I type articles from sources like books, magazines, newspapers?

no, you will not be paid for things like that.

I think that if you just use parts of it and say what source it comes from and then make comments about it, then it would be okay to do that. Read the rules for the site and it should tell you. Howeve, anytime that you use writing from another site, you have to tell where it is from or it is plagerism.