No brake pressure after Starting the car

I have a 2003 vw golf and i have a brake problem.
After i have bleed the brakes and feel that they are working I jump in my cart to start it bu as soon as I do so it just looses all brakes and ive done this many times over and over

Another weird thing:

• I can pour in liters and liters of oil but only a small ammount of oil accually comes out but I have no oil on the floor.