Hello lucian,
I would like to extend to you a warm welcome to you for joining us in LU. I'll try to answer some of your questions to the best of my ability, I might be wrong though (don't blame me :p)
1)If I'l start a new big project for a server RPG, will be a good ideea?
Personally, I think that LU's half dead/about to die, there are still players that play, and during peak period, I see around 15+- players around, that's not the case eveery day though. If you are confident enough, you might be able to bring LU back to life again;) to its former glory of like 50+ players. That was quite long ago though, and it would really require a huge amount of deciation to the server. Another server owner, Motley previously had the whole of LU hyped for his upcoming server which featured singleplayer styled gamemode. But then he decided to stop working on it, so now we're left with 4-5 servers. But hey, if your server is really good, I believe that it will get lots of players.
2) How many players I can wait to login?
Probably around 10+- during peak period, there are times when not a single player is in LU though.
3) How many slots is maximum fot a LU server?
128
4) There is any good scripter on LU forum who can help me or work with me? (If you have your own server workfull, I can support with money to keep it alive hosted +website/forum/panel)
I have a few years of scripting experience in LU, definitely not the best but I'll be willing to help
There are a few more scripters online in the LU discord and I'm sure they'll be willnig to help you out too.
5) Can I make a database mysql wich can save datas every player logout?
Yeah you can, lu has a mysql and sqlite module, one for reading from a file in the server directory and another from reading data somewhere online. I believe the sqlite module's already included in the server when you download it. There's also Inis too.
http://forum.liberty-unleashed.co.uk/index.php/topic,917.0.html6) There are functions for an RPG server as /startwork /sellproperty /buycar /buyhouse and more?
You'll have to script them yourself, there might be a similar script hiding in script releases though.
7) Whay system is required to a dedicate server to can handle the maximim number of players? (Ramm/cpu/hdd/etc)
Hosting an LU server dosen't require much to be honest, the whole LU server's only about 2+- MB, however if you're planning on adding sounds and sprites, the size of the server will probably increase. Do take into account that currently, there's a bug in LU that kicks people out for 'afk'ing in game, it also happens when people are downloading server data too, so if there is too much stuff for the client to download, the client may not be able to join at all.
8)Would you like to see this project alive,functional and without bugs?
Definitely!
If you need help for anything, simply just post a question in the forums(it might be even more dead that LU itself though). Alternatively, you can also ask the LU discord. There's 2 currently, but I don't know the link to one of them.
http://forum.liberty-unleashed.co.uk/index.php/topic,2800.msg14618.html#msg14618https://discord.gg/ccDJQVF