1.A brain [IMPORTANT]
2.Latest version of Flashtool Here
3.Android EXT4 unpacker Here
First,extract system.sin from FTF using 7zip.
second,open flashtool,goto tools>sin editor then select the system.sin that you have extracted from FTF and click extract data.
third,you will have system.ext4 after extracted the system.sin.Open Android EXT4 Unpacker and select system.ext4.
finally,click extract on any files that you want to extract and choose the directory where you want to save the extracted files.
You can find the extracted files in the directory that you choose.
That's it! Now you can extract/view all the system files that you want!