You are executing get as a Windows command (from batch file). But it is WinSCP command, so you need to pass it to WinSCP.
See documentation:
https://winscp.net/eng/docs/guide_automation

I have it almost working. I got the files to be deleted locally, able to login but when I try to get the files I want *.* it does not work. But when I do login I can get the files manually by typing get *.* and it works just fine. What am I missing in this script? This should be really simple.

echo off
del D:\test123\class.csv
del D:\test123\students.csv
"C:\Program Files (x86)\WinSCP\WinSCP.com" serv01
get *.*
exit