My brother would like me to make him a poster for his bd party and he would like his name written same as in this Los Angeles picture. Is there a free font or typeface similar to this?

There are sooooooooo many great script fonts out there these day. I suggest you go to dafont.com:

https://www.dafont.com/theme.php?cat=601

They're all free and there are hundred to choose from, it's a matter of taste.
You may like to checkout: Tasty Sushi, Flaming, Back to Black. All would be great for a project like this.

But hey! go see for yourself.