That't definitely not a normal sound level. That's about the same as a gas lawnmower, and actually would require hearing protection if you were exposed to that level for 8 hours at work.
Is the engine cover/doghouse fully seated? The side latches need to be secured before the bottom latches.
Is the exhaust system intact?
And yes, for the handling issue, check tire pressure first, and adjust according to load. Front tires should not be fully inflated. Door tag is a good start but tire pressure vs load charts are even better. Besides that, have the front end inspected for wear, and make sure it's set to max caster (5-5.5 degrees). Also, make sure it isn't loaded to take too much weight off the front axle.
