> je ne marche _pas_ (I not not walk _any step_)

It merely means I do not walk. There's no particular connotation. It has absolutely nothing to do with pas as in a step.

> - je ne me bat _guerre_ (I do not fight _any war_)

Je ne me bat guère means "I hardly fight". No relation to war.

> - je ne coud _point_ (I do not sew _any point_)

Je ne couds point means "I don't sew". Again, no particular connotation. Point means the same as pas in this case and has nothing to do whatsoever with stitches.