If you expect any useful help you will have to provide some useful information.
The device itself appears to be a standard character mode LCD and without any other information I would be cautioning you about the fact that the connections (for the one I found on-line) are at the lower left of the pc board instead of at the upper left. These devices frequently have a nonstandard pinout meaning that pin 1 may not be at the outer edge of the pc board, etc.
On the other hand you mention only three connections implying that there is some sort of adapter board between your display and the Arduino. Since the only I/O pin on that adapter is labeled 'IN' that implies a serial interface, but not I2C but as is currently quite popular.
The error messages seem to indicate that the Arduino IDE could not find whatever library your missing code is trying to use.
You really should read the instructions on how to use the forum software, particularly the part concerning the use of code tags.
Don