greatings all! just bought a gorgeous 1981 maluch in poland

she runs good, but a few questions.
Signals not working... however when i turn headlights on, and do signals, they switch to high beam?? Where is the fuse? any tips for common problems that would affect signals?
General questions:
tire pressure?
fuel guage - how accurate is it - is empty 'empty' or reserve left?
any other tips or tricks of things I can 'tune' up with no tools would be appreciated haha
i already topped up the oil , and burned my hand in the process - touched exhaust manifold while grabbing dipstick... ouch!!!
lloving the little car though