the vibration is coming from your engine, older engines can run a little rough, and that vibration is transferred to the wheels when the brakes are held... when put into neutral the vibration stays in the engine. Thats not a big deal, and a tune up would likely resolve that problem.
As far as the creaking goes, it sounds like perhaps you have a bad ball joint or something similar. The ball joint is what connects the wheel hub to the suspension, if the rubber seal around it breaks and the grease gets washed out, or it gets wore out, it can creak when it moves (turning or going over bumps). This can also be dangerous because if a ball joint gives way, your entire wheel hub assembly can fall off (had it happen, not fun). You can take a look at it and see if it looks worn or the seal is broken, it will be located where your (providing the car has independent front suspension) A-arm hooks onto your wheel hub, on the bottom. But either way it would be wise to take it to a mechanic and have it looked at and/or replaced. It is generally an inexpensive part to buy.
If its not that, then it could be that your suspension is rubbing against something. If you have been in an accident or ran over a big bump hard and slightly twisted or bent the support or a structure near it, it maybe just enough to rub when the suspension travels and make a creaky noise.
hope that helps
It can also