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The wording is indeed highly ambiguous/confusing. It needs clarification.
As of right now I think that only the two characters that used the tickets will have access to them, but I can't say for certain. I don't see why it's this way; it's terrible if so.
I can link you a build but it's going to depend highly on what point of content NA will be at, so I'm a little hesitant to post anything super concrete as far as skill trees this early. Techer is pretty easy to set up for a subclass, you won't really have to make any hard sacrifices.
For Force, you will have to make sacrifices somewhere if you wish to spec into all the elements. There isn't enough skill points to go into everything you'd want. Exactly what gets cut depends on the content and how the skills are balanced. I can't give you a solid answer there right now.