Combine and Process multiple CSV files to import to MT4 History Data

1) I have 70 csv files that need to be combined into one csv file

2) the csv file must be process i.e. alter so that it can be properly import into MT4 history from 1999 to 2015

Below is a screen capture

 Attached is 1999 to 2000 data in 4 CSV files for you to review. Once selected, I will send you all the 70 CSV files.