I would like to know if there's a program that can press keys. For instance I would like the program to press Ctrl+v and Print Screen. I have googled a bit and found out that notepad can do this but I dont seem to get it right.
AutoHotKey is exactly what you're looking for.
Theres ACTool for example. It was made for a game (Asheron's Call) but it works with anything else, too.
If you need to write a script to automate key presses, try AutoIT. It is its own scripting language but can act as a plugin to vbscript & powershell
Another option is Jaex/Automate. It is open source and has an easy interface: