Authors with high reputation are likely to contribute best publications. Obviously citations are likely to be more!

Yes if his publishing with high citation.

If the author is a high profiled figure in the field of research and his/her research paper is related to the study that has been conducted, then s/he is worth citing.

yes ofcourse.

first author or corresponding authors definitely give some importance to article

I believe its the quality of the work and a known author will always give out quality work

yes it plays an important role, at the same time the topic Research also equally important.