It's the same for all vehicles, the oxygen sensors are either on the exhaust manifold or just below on the headpipe. They are about the only thing screwed into the exhaust that has a signal wire connected.
Not on the clutch itself but on the clutch pedal there is one for starting.
behind the catalytic converter
The speed sensor on a 1999 Saturn SL1 is under the transmission. It is below the fittings for the transmission cooler lines.
yes
crank sensor is bad
The camshaft sensor on a 2000 Saturn is located on the firewall side behind the lower engine assembly. The camshaft sensor is the last one with a connector facing the transmission.
The tft sensor is located right beside the trans. external filter. The breather box needs to be removed for access to it
134a.
The oil pressure sending unit is located on the back of the block. it is the sensor located closest to the alternator.
The starter on a 2001 Saturn SL1 is located on the driver's side of the engine. It is just to the left and in front of the alternator/generator.
show warning lights and what they mean on 97 Saturn
Saturns have optional 15" tires; so, as long as they are both the same diameter, yes.