If you want more likes, you’ll have to give people a reason to like you. Like Joshua said: you need content on your page.
So, how do you get many likes? Look at what people love to share. People love ‘cute’ animal videos and pics. So, follow a couple of high profile pages with tons of followers and share their pics and vids on your page. Go on youtube and find some cool videos, click the share button and share them on your page.
If you have the opportunity to create some pictures and videos yourself, do so. Then share them on your page and on other popular pages. If you post to other pages and share their content, they will do the same for you and exposing your page to tens or maybe hundres of thousands of people.
Try to do this every day: share on or more of your own pictures and share a post from someone else’s (highly popular) page.
You’ll see your number of likes growing very rapidly.