What is the best camera in UFC 6?

Wide. You see the legs and the cage. Medium and the tight angles hide the shot.

Should I turn on Free Combinations?

Yes, once you are past the first tutorial. It stops the game from throttling strings that are not on its preset list.

No. Use it in Practice Mode to learn a window, then turn it off before you queue.

Settings → Gameplay → Control Assist. The full walkthrough is on the controls page.

Change four things before your first real fight: camera, combo throttle, stance buttons, and the assists that will vanish online.

The UFC 6 settings that matter: Wide camera, Free Combinations, stance-based striking, and which assists to turn off.