english is not my mother tongue
You want to sacrifice safety for looks? If you're in an accident that does that much damage to you physically chances are you were doing something you should not have been doing. Leather jacket, good choice. Protects from road rash and blocks the wind from chilling you. Boots, regular work boots are fine. Wearing sneakers on a bike is inviting trouble. About the only thing chaps are good for is to block the wind from your legs, unless you're a pole dancer and use them in your show. If you don't wear a helmet, and don't give me that freedom of choice crap, you are a first class grade a bone headed idiot. Dead is forever. Beauty won't prevent that.
A leather jacket will reduce road rash should you go down. You don't need a designer style leather jacket. A basic leather motorcycle jacket won't cost an arm or a leg. I got a leather jacket a few years ago at the international motorcycle show for $100 and I'm still wearing it. Boots will add some protection to your ankles and feet but I wear them mostly because they give me better footing at stop lights, etc. I bought mine for $60.00 two years ago and I'm still wearing them. I haven't been able to bring myself to wearing chaps yet, jeans are my preference. As you said, none of these will prevent broken bones, or worse. They do help reduce some of the hurt though should you go down and it doesn't have to be expensive. As far as wearing a helmet or not wearing one goes, there are people on both sides of that issue. Make your own decision on that one, unless you live in a state that requires you to wear one. Then your decision is made for you.
I would say Public Works, but, if you are still unsure, you could always ask someone City Hall or some equivalent.
A helmet and leather apparel (Gloves, leather jacket, boots, etc., etc.), as you aforementioned, are a good start to the proper attire needed to protect oneself against a spill on a motorcycle. Making sure your cycle is free of wear of the important parts pertinent to ones safety,(such as tires,brakes,signal lights) are also a significant factor. Combine the two with close adherence to the speed limit couldn't hurt either. Wet weather does make it more difficult for one to have total control over something with only two wheels, so one may want to adjust ones speed accordingly . Should a spill occur, it is crucial for one to relax into the spill rather then tense up, this will (while not so much as cushioning the fall), but will help one to absorb the impact and lead to less chance of ones bone breaking factor.