Hi, as you can see all my file was set to 644 permission: http://prntscr.com/agfze9 But you have 600
Also I have changed file permission on Installation folder to 644: http://prntscr.com/agg5ey and now you can access the installation screen.
You should you FTP app to change your file permission to 644 as in the screenshot above.
Note you should apply to files in all folder.
After change your files permission you can use database infos to install the template.