Starter is where the transmission and engine connect, below the intake.
If the starter does nothing when the key is turned to START, it could be the Starter Interlock Switch if it's a manual transmission, or the Transaxle Range Switch if it's an automatic. Could also be the starter itself, or wiring, or a fuse.
Check for a blown fuse first. Fuses are under the hood on the passenger side.
With the clutch fully depressed (manual) or the transmission in Park (automatic), check the voltage across the S and B terminals on the starter with the key in the START position. Don't kill yourself doing this - it might decide to start. Should be above 8 volts.
If above 8 volts, remove the starter and have it tested.
If below 8 volts, check the appropriate switch and fuses.
The starter interlock switch on the manual transmission is located on the clutch pedal. Remove the wiring harness from the switch, and measure resistance across the two terminals. Should be continuity with the switch depressed, open with the switch not depressed.