i cant attach my player model to fixed joint rigidbody

That is a LOT of things all at once.

Slow down and break what you need into pieces and try one thing at a time.

If you’re unclear on fundamental workflows in Unity, try some tutorials.

Nothing you list above seems complicated, but it’s very poorly described so I cannot even comment specifically.

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

This is the bare minimum of information to report:

  • what you want
  • what you tried
  • what you expected to happen
  • what actually happened, especially any errors you see
    - links to documentation you used to cross-check your work (CRITICAL!!!)

You may edit your post above.

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: Using code tags properly