I need some help !

You can find a lot of useful guides on our Wiki.

If this is not enough, feel free to ask us your questions by sending us an email at our mailing list, or you can join us on IRC on the channel #tosca on Freenode.

I would like to delegate the installation of Tosca in my producing environment

Then you can contact Linagora. Linagora also offers some services like the Open Source Software Assurance which is using Tosca and could interest you.