Welcome to the board. Sorry to respond that harshly to your first question, but not going to happen. Without huge changes years before the war that is completely impossible. Basically the French Army was in the situation of the Prussians in 1806. The French army was outclassed in almost any regard:
The mobilisation: France had the larger standing army, but that army was actually slower to get into position than German reserves called up. With their reserve activation the German states fielded 1 400 000 fully trained men. France managed in the whole war to raise 900 000, half of them belonging to the Garde mobile. The only thing worse than the garde´s equipment (the best rifle they had was probably the Tabatière, accompanied by everything available or quickly imported) was probably their training: Beyond the initial two weeks they had - in theory, not in praxis - 14 day training each year, but never two following each other.
The strategic level: France did not even manage to get their designated offensive forces fully equipped in advance much less supplied. A prime example of their faulty logistics is the battle of Mars-la-tour or rather what happened before and after. The attempt to improve its supply situation was one of the things delaying their march and allowing the Germans to catch them there. Despite these attempts at supply and a not particular offensive stance of their commander they ran through almost their entire ammunition on that single day, making the draw achieved a moot point.
Even more ridiculous, the French had obviously no contingency planning what to do in the strategical situation on the outbreak of the war. The various parts of that force in the initial stages simply blundered around without any coordination.
On the tactical level the situation was more even, at least while the French where on the defensive: The French regulars had the Chassepot rifle, clearly superior to German rifles and the mitrailleuse had real potential as well. Though it was never used in a sensible way a charge against those would have been really a bad idea. On the other hand Auftragstaktik gave the German armies much better reaction time and they had the far superior artillery. Though not as dominant as 40 years later the tendency of artillery dominating was already there.
With such structures Turenne or Napoleon I. might have reached a draw. Perhaps, but probably not. Anything better requires fundamental reforms before the war, as they were desired by single officers but impossible for political reasons. Anything which could sufficiently change that would all but assure that the war does not happen as otl. Bismarck would act more cautiously if France is actually a threat.