I've only played gigs through promoters here in the U.S., but I do know that they usually fill out a contract similar to this:
https://www.docracy.com/5972/band-performance-contract
As far as promotion, create flyers, band logo's and such, and set something up on facebk, or other social media.
Terminology:
Load-In - Loading the equipment into the venue.
Load-Out - Unloading the equipment to your transportation.
Sound Tech - The person who will be in charge of the venues PA system (get to know, and be nice to this person).
The Door - All income collected for the "Cover Charge" (may not apply).
Basic tip: If you are mic'ing everyone to a PA, then make sure the drummer gets his own monitor, and similarly if you aren't mic'ing, and have no PA system (which would be the worst case scenario), then put all amps behind, or near the drummer. Just make sure the drummer can hear everything, and things should be tight. I've seen things fall apart real quick because the amplification was in front of the drummer, and the drummer couldn't hear anything but himself.
That's all can think of right now. Happy jammin!