I will say that many companies do not accept CVs now. You can only complete their online application form. A recommendation is difficult because everyone gives conflicting advice. For example, the summary you refer to, often called the "objective", some say is essential, others say is redundant and makes it clear you are copying everyone else and have no judgement of your own. A large website like Linkedin.com will have many articles on this subject.

It depends on the job you are trying to apply. So you should check a resume format for that specific application. There are many websites online that help you with that. Cheers