I've had a few bikes that make a loud click and others that make various strange noises. As long as it's starting on the button, don't worry about it. I know it's been icy around where I am at the moment so could answer your handling problems. Brakes just top up usually with dot 4 but check your handbook or online just in case. And as someone else mentioned, keep an eye on your pads if the brake fluids getting low. Very cheap to buy and easy to do yourself if you take your time. If you're new to riding, really take care in this weather mate, and make sure you're tyre pressure is perfect before you ride. Happy New Year.