How can I install remote start in my toyota corolla 97 ?

After carefully selecting a remote start kit, read, then re-read the installation instructions while comparing what the instructions are telling you with the vehicle and/or schematics. Look carefully for the wire colors and locations before attempting the install.
If done improperly, the install could result in either a simple no-start condition. Done really wrong, you could potentially damage major components.
Simply put, this isn't a quick project for the inexperienced DIYer.