Have you got it yet?
Assuming its like my old Thorens, you need to:
Release the transit bolts.
Check the oil in the main bearing.
Put the outer platter on upside down and have a look at how the belt runs.
Adjust the springs.
To do this, remove the base board to see how it all works,
check the springs are not twisted / off centre.
Then support the turntable on 4 dog food tins.
This keeps it level while you adjust the suspension for a nice even bounce.
Clean the motor pulley, the inner platter rim and the belt.
If all is well, your first purchases should be a new belt and a felt mat.
Or some records.