Needs for a railjack mission without having one

[Doc-Orange]

I just started to build a railjack and because of the waiting time I want to join some missions with other crews. Of course I want to be useful and I saw that one task is to repair with an Omni Multitool. I dont find one in my inventory. So I have 3 questions.

1) How can I get an Omni Tool?

2) Are there other things I need to be useful?

3) I dont find a mission guide on the need. Do you know a good one?

 

[Reytac]

When you join a railjack crew you are automatically given an Omni tool, it appears in your gear wheel. Other than that there isn't really anything special you need to get started - just a decent warframe and archwing set up if you're planning on exiting the railjack. You will need decent weapons though for your 'frame because every so often your railjack can be boarded by teams of Grineer so they have to be put down. 

[Kista-]

Missions will earn you intrinsics, bascially personal skill points. You can use them via Esc, Profile, Intrinsics. Even if you dont have an rj or it's still being built.