buy a new window
You can purchase a repair car window kit that has the instructions on how to fix your crack. If you have insurance however, I would recommend getting a repair shop to fix it since it is covered on your isnurance.
usually by replacing window regulator.
change the window seal / gasket.
you need to replace the window regulator
Try a silicone lubricant.
that car has issues with the windows and VW knows about it! Call your local VW dealer and ask if they will fix it for free! they would fix all of them for free awhile back regardless of the milage on the car!
You would diagnose the problem to determine what the cause is. Assuming this is a power window, it could be the electric motor, the switch, the wiring, the circuit breaker, the relays, the window track, the window regulator and so on.
Hold down the child lock when you press the button to raise the window.
You will have to have the window tint redone. Find a local tint shop with a good reputation.
buy a descent car