Hi,

Is it a good idea if I buy the 13€ Parallel Module (LPT1) and a PCI express DB25 parallel card and LPT cable? would it then work?

Yes, cheap and cheerful. Once upon a time ALL Mach3 was run that way.

Be sure you have 32 bit Windows 7 or XP, the parallel port WILL NOT work on 64 bit, laptops or Windows8 or later.
Best idea is do a fresh OS install and only have enough software just to run Mach and no more. No internet. No anti-virus.
No updates. No nothing....Mach and Mach alone.

Craig

Be sure you have 32 bit Windows 7 or XP, the parallel port WILL NOT work on 64 bit, laptops or Windows8 or later.

I don't have Windows 7 or XP license. Does Mach3 work on Linux? Or anyway I can get it to work on Windows 10?

Yes, it will work in Windows 10. Get a UC100, like most Stepcraft machines use, and plug it into the parallel interface card.
https://www.stepcraft.us/shop/product/10100-parallel-module-15?category=5

Stepcraft claims their machine at run at max. speed of 50mm/sec=3,000mm/min.

To achieve that Max. Speed, the Windows 7 32bits PC running MACH3 will need at least a CORE-2-Duo 3GHz CPU and running MACH3 kernel speed at 45,000Hz.
I upgraded my old PC from core-2-duo 2.4Ghz (max speed was 1800mm/sec) to Core-2-Duo 3.0Ghz for AUD$9 from ebay and max speed went up to 3,000mm/min and I could surf the INTERNET while machining with no issue.
I also have a new PC with I5 7600 9 3.6GHZ (4cores) and I could reach 4,000/mm with no problems even though my motors are still at 24volts.

BUY a 2nd hand Windows 7 32bits PC. They should be cheap and readily available for below 150 EUROs