My heating matrix is connected with the hose with the bleeding port connected to the bottom port and the other hose connected to the lower port.
But in this diagram it should be the opposite. Can someone confirm the right connection?

ok, I see in the parts diagram it is connected properly.

Does anyone know which gasket is suitable for my car?
There are 2 options for c06.
What does the cross sign mean?

Cross is for a C063 Twingo and not in stock anymore.

Are there any torque specs for the exhaust nuts and studs? and for the pump bolts and temp sensor plate? and valve cover?

studs and nuts are hand tighten, (limited windings ).
water pump 18 , valve cover 12, temp sensor probably 20 .
Always check for leaks after warm up.

I think 18NM is too much for the water pump and temp sensor plate. I broke 3 bolts and stripped one thread.

new bolts ? sorry for that. Your torque wrench is exactly calibrated ?
Next time torque by hand.

No, old bolts broken but when I put a new one, the thread got damaged, it wasn't a big issue, but I kept the plate of the temp sensor on 11NM.

When I tried to put the head over the gasket, The gasket moved and got scratches and bent, do you think I can still use it?

I don't know how to keep the gasket in place while putting the head back on, it's heavy and I've already ruined one gasket.

I cannot help at all, but firstly, the gasket is self adhesive,
secondly, you need to put in 2 headless bolts to guide the cylinder head.
Wish you luck, its seems not at hand right now.
Normally, documents should guide your actions.

18 for the waterpump is much to much https://www.zemo-tools.de/index.php?spra...=4&code=26

I did it. You have to be careful and only lower the head over the gasket vertically. I used 2 drill bits to make sure the gasket is locked in place in 2 corners, I removed one of them by hand and one of them from the head hole with tweezers.

Any torque specs for spark plugs? Exhaust pipe 2 nuts?