Is it possible to add several keywords to the same page?
Yes but It doesn't seem practical.
Will this penalize my page by Google?
Possibly (see below)
What is the implication in adding many keywords? I am expecting I get traffic from all keywords, if it is 100 or 1000000. Also I would like to know, meta-name should be keyword or...
It's actually a wonderful way to make your server slow.
The reason is because in your image example, if you start adding a whole bunch of keywords in your meta tags then its more data the browser must process before users see content. This will hurt mobile users with poor data connections (and no wifi) who are trying to connect to your website, and if your site is by chance extremely popular, its possible that hundreds of mobile users with poor connections are hitting refresh frequently because they think the page isn't working when the middle of the meta tag in the page is being downloaded to all devices at once from the same server. While upgrading the server is an option, your better option is to simply cut back on the code (including unnecessary meta tags) and show more content.
Take a look:
These are URLs to services that can assess the amount of code to text on your site. It will tell you how much text of an entire page the user can see and how much is code. Try to make the percentage it reports to you high to get better ranked in search engines.
As others mentioned, take those keywords out of the tag and blend them into your actual content that people can see, but make sure the keywords become complete natural paragraphs.