put your finger over the exhaust stinger and give it a couple of (short ) pulls... You will see the fuel go thru the fuel tubing... pull starter until the fuel reaches the carb and stop pulling.... If you do this with glow igniter on as soon as fuel hits carb.. buggy will start... If not attached... just put igniter on and next pull, it will start...
your 2nd question is the exhaust pressure pushes the fuel thru the tank... the engine doesn't suck fuel from tank.....you should have a tube going from your muffler to the gas tank....