Ahoy there Trader.. blah blah cut the RP thing.
Anyways, welcome to Discovery yeh, read the rules if you have any other questions don't be afraid to ask and most importantly have fun.
P.s I will now answer the questions you already asked.
I have not choose a faction yet, is that an obligation ?
When is it suitable to do so ?
-You can spend your whole "life" here without having a faction, and you can also choose one whenever you wish.
Can i have several ships (is there like a parking place of some sort) ?
-You can have several ships but not on one character you have to make a new character and then obviously you can get another ship, unfortunately on one account you can only have 5 ships/characters, but there is a thing called "Freelancer Account Manager" use the search function here on the forums and you will find the download link and how its used.
If i bend (or break) inside rules like the tech chart, border control legalisation ect..will i get just political inside problem or real server Administration problem ?
-Most likely a real server administration problem but also diplomatical problems with the factions if you use their guns but you are not affiliated with them or didn't get their premission for it, and stuff like that.