1. Can I see my reputation values somehow ?
There are console commands to alter reputation values, but I cant find any to display my actual rep

2.After some NCR quests I got the status "accepted". Doing some more NCR quests at Camp McCarran, "accepted" popped up again, shouldn't I got to the next higher level instead?
I did nothing to get infamy (stealing just damages my karma, right ?)

Go to your Pip-Boy; enter 'STATS' then enter the 'General' tab. If it displays karma, look at the top right corner for 'Reputation' and press the corresponding button/key.

And yes it should have, although stealing affects your reputation too, but only if you're caught. If you were caught, it'd probably have went to 'Mixed', so I have no idea why it went back to 'Accepted' again.

Im looking for a console command, not the pip boy status. Numerical values !
Never was caught stealing