AdWords is a purely search marketing(SEM) service. SEO practices do
affect quality score and quality score is used to scale bids, so it
can affect your SEM performance, but is not something that AdWords can
help you with directly.
> 2> Keywords ranking in Google.
If by this you mean ranking of you *Ads* on the google SERPs and in
the content/display network by keyword, then yes, but again, this is
not the ranking of organic search results, just the ranking of ads as
this is AdWords.
> 3> Keywords suggestion tool
> 4> Keywords competition
> 5> Keywords monthly search
These three things are available through the TrafficEstimatorService
and or TargetingIdeaService which are AdWords API services and can
have SEO analysis value, but the use of these services is really
intended to help out with SEM rankings.
> 6> Backlinks
> 1> Website Page Rank. (PR)
These two are purely SEO and are not supported in any way by AdWords.