TMP and TEMP files are temporary and can be safely deleted. They are usually dumped on the hard drive and forgotten about by some programs if they crashed and were meant to delete them.
Image file
System file
Temporary File
system file hgu
backupfile
A text file, usually with numbers, letters, and/or simple graphics.
animation/moviefile
Animation/movie flie
Extensions are the last part of a file name for example a text file is usually called example.txt the .txt at the end is the extension and can be many differant things depending on the program that creats it.
.tc is the file extension for a Borland configuration file, for programs from the Borland Software Corporation.
Usually a .exe file, meaning that file is a program.
An image file. It is a Microsoft bitmap file. You can open it in almost any image editor or viewer