Ebay is a good place to start for general used items such as this.
None. You have to remove the pan.
Yes,
That would be the FS-DE inline four engine. It can be found in:93 - 02 Mazda 62693 - 97 Mazda MX-699 - 03 Mazda Capella01 - 03 Mazda Protegé93 - 97 Ford Probe99 - 06 Kia Carens/Rondo/Sephia
In the Owners manual.
The owners manual says 93 octane.
Your owners manual should tell you
Check your owners manual, it will tell you in that.
owners manual
How long is a piece of string ????
Listed in your owners manual. If you have no manual tell the auto parts store you want to buy an OEM spark plug.
Loc under dash
On my 94 MPV the Mitchell on demand repair manual says to remove the panel in the dash where your display is, their is a small screw, take screw out of the place it is and put it in the other place provided. I haven't done this yet but my light stays on also, they come on automatically at 80,000 miles. Hope that helps. Disconnecting the battery won't reset it. A friend of mine told me to disconnect the battery. Not 100% sure, just what i was told.