Does Los Angeles have public transport?

No duh.........

Yes it does.  It has a light rail network and buses.  However, the city was built for automobiles at the turn of the 19th and early 20th century.  Public transport is often not for the typical person.  Riding the blue line you take your life into your hands.  You might meet the guy without eyes who aggressively tries to sell candy or the guy that comes up to white people and yells that we "hook nosed Jews" need to be exterminated (I'm not even Jewish).

yeap!!! it has alot of buses and trains

It does, but it’s generally not that good. There are lots of buses, but they tend to get stuck in traffic.  When I went there I got around by light rail which was pretty efficient, but didn’t cover all that much of the city. However, it did cover a lot of the tourist areas. 

It does but because it's so large geographically its current systems only cover certain parts of the city. 

Yes, they do. https://www.metro.net/ , https://www.discoverlosangeles.com/travel/los-ange...

Some, but less most foreign cities its size or New York City in the U.S.  There is DASH, which are small buses that loop through a neighborhood; Metro, which has both full size buses with a large network reaching as far as Thousand Oaks and Malibu to the west and a few rapid transit (like the NYC subway system, but much smaller) rail lines; and Metrolink, which is about a half dozen commuter rail lines (real passenger trains, stopping maybe once every 10 miles or so).

Yes, they have subways, buses, and light rail.

Los Angeles is home to one of the country's best public transportation networks, including subways, light-rail, buses and shuttles to nearly every corner of the Greater Los Angeles area.