The color of the antifreeze does not have anything to do with the type of anti-freeze. Anti-freeze manufacturers can make their anti-freeze any color they choose. You can use any SAE certified anti-freeze in your 1997 Toyota Corolla.
It screwed in to the exhaust manifold. To change it you unplug the sensor and unscrew it with an O2 sensor socket.
To begin, you locate a speaker which you want to remove, and grease the sides around the desired speaker. Then, using an exact-o knife, you want to go around the edges of the speaker carefully. Once it seems that you have loosened it enough, use a butter-knife, or a more suitable tool, to pop it out of the socket. There will be several wires still attached to the speaker. Take them all out of speaker, one by one, and wrap the ends in electrical tape. You must leave the wires in the car though, or else the radio will not work. You can cover the gap where the speakers used to be with a sheet of plastic, and glue it down using basic extra-strength glue. Apply the same to the other speaker. These instructions are based on if you do not have car-mechanics equipment.
Yes it will fit. Both are 4x100
Your local public library should carry specific books for each make and model of car. Otherwise try your local college library and 9 times out of 10 they will have any wiring diagram you need.