We already have a thread that tells you where to find QB. If you'd like a quick response, however, check the link at the top of the page called "Click here to see Ildurest's download page.". If you're too lazy, click here . Should be somewhere on the page.
If the lessons of history teach us anything, it is that nobody learns the lessons that history teaches us.
BASIC: It's easy, fun, simple, and won't mutilate you.
QB 7.1 and QB 4.5 are very similar however QB 7.1 has more database functions and a few other goodies. The advantages aren't great and QB 4.5 is far more popular; if you want to be sure most people can run your code get that. If you don't care then QB 7.1 is fine. QB 1.1 does not have a compiler (cannot make EXE files) however is, unlike the others, legal.
"There are as many ways to write a program as there are programmers."