[OldSam]

No, absolutely not a full character generation, way to much work! ;)

Basically you just need to write down some Attributes, Basic Speed, Basic Move, Hitpoints and a few primary skills (Weapon-Skill/s and NPC-Profession), that fit to your idea. Maybe some noticeable (dis)avantages, too.
Then of course, you need a weapon of choice and eventually some body-armor.

Just write down what's really important and improvise everything really.

To save work you can also use any given template and modify it on-the-fly during game-time. You can make up everything in the moment you need it, but as a beginner it helps to be prepared a little better than that ;)