My msc wont start up after i deleted many of system files. disk utilities says everything is ok but i cant get nowhere becsuse the.missing files

I tried everything, including sll command

Ok, it sounds like you will need to start over - make sure you have a backup of your important files, pics, etc. because you have to erase the drive.
Once you have a backup, try this (it should work since you say the original system was Lion):
Press Command + Option + R keys while booting up or restarting - this will show you a rotating globe and you should be able to access Apple's servers. Once you're booted up and connected, choose to open Disk Utility and erase your entire hard drive. When that is finished, it should be ready to reinstall the original system. This will take a while because it has to download the whole thing. Once you're finished with that, run Software Update. When that is finished, you can put back the files you backed up.
After you make sure that everything is working, then you can download Mavericks or Mountain Lion - whichever one you want.

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