Is there way to No index no follow post,page without plugin in wordpress
Yes but you would need to add some code in the head of your site using a conditional tag. If you are using a ready made theme, this should be done in a child theme so your changes aren't overwritten next time your theme comes out with an update.
Why you don't want to use a plugin? It's easier and faster, that's what plugins do normally.
As ipage server slows my site so i avoid plugins