There are actually 2 separate questions here.
About spurs: every horse is different and you should just try to see whether spurs work for you.
About the crop: he obviously gets nervous when he sees it, so you should desensitise him (by gently stroking him with it, first on the ground, and giving him treats, etc. until he learns not to worry when he sees or is touched gently with the crop); at that point you may start to use it more effectively; also a dressage whip is better than a crop, just slightly tap him on his behind when you feel he's not reacting to the leg
In the beginning of my ride when my horse is not listening to my leg I will do a leg ,voice, stick so if I use my leg and there is no response I would use my voice and if you doesn’t respond then then I will use my crop I do it a few times and it’s becoming easier for him to respect my leg more than what it was and beginning
Hi 🙂 I think the best thing to do is learn to him to respect your leg. You will have tough sessions at the beginning but it will work with time. You can be very strong with your leg, until he responds. At the slightest response you release your legs and you reward. You can do a lot of transition work, when you ask him to move forward be progressive in your demand, start using you leg slightly and increase the pressure if there is no answer, if he still doesn't answer as quickly as he has to, you can use your crop. But as soon as he answers, reward him. By doing it a lot and a lot, he will learn that it's easier for him to respond as soon as you ask with light aids.
Hope it helps x