The smell of coolant (in the engine bay) is typically from a leak onto the engine block or exhaust manifold. Pressurize the system to check for leaks.
The noise could be one thing or a combination of things, Check the carrier bearing (in the middle of the drive shaft) for play, the differential, brake calipers (one may be sticking), ball joints, and lastly have the wheel bearings checked.
The TSRM covers the troubleshooting of many common issues:
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/