Yep, I believe that provided your other toes are mechanically working correctly (ie. no deformities and leanings towards to big toe - that you should be able to perform you duties walking with no problem. You can get specially made shoes to support your arches and ankle to that you get off "gait" you will not transferring to one foot and temporarily you may find that you will limp for a while which could lead increased pressure on knees and hips - but with the right cast/air brace and physico and shoes - you should be good to go.
Keep us posted with any further information you have and I will see if there is anything else that may be useful info for you. The operation is quite quick if just the 1st MTP and once up and mobile, within reason, you should be able to continue a job with walking as the fusing should cause the pain in the big toe to cease. Sinply the big toe will NOT move (depending where they fuse - mine did have to be done twice, second time was a breeze and no complaints after - now the rest of the fusing in my Right foot did not work, but that's a whole 'nother story.
1 big toe - you should be cruising.
Physio important tho!!!!!
hope this is a bit more helpful.