No.
That depends on what you are using it for. Obviously, if you are dirt biking, you should use a dirt bike, and otherwise use a street bike. Start out with what you are going to use the most - dirt (freestyle) or street racing.
First make sure the bike is in neutral and push kick start down on right side of the bike.
2 words kick start. you start with the bike in neutral and kick down the kick start located on the right side of the bike and give it a little gas wile your kicking it (if its cold u mite have to put the choke on wile doing so)
it is broken
Start by lookin at eBay.com, or at dirt bike scrap yards
Sit on it, start it up and ride it.
it won't start.....period
to start of with a50cc
your dirt wont start because if there is no oil there is no oil compression which will cause your dirt bike to not start Answer Before it gets to that point, perform regular maintenance and oil changes. This will increase the life of your engine.
bring it to the shop
It means that somethings wrong with it.