- Study Helper
I recommend reading this thread which should answer your questions.
And you'll find some other STEP related threads in the University level section here.
Detailed information can be found in the prep thread here. Examinees typically select the papers listed in their offers. They aren't modular exams like A-level that culminate in an overall qualification.
Yes, the url you provided does indeed contain links to past papers.
What do you mean 'right link'? If it has the papers/schemes, by definition it's 'right'. The owner didn't create a site of fabricated papers/schemes to fool people. Clearly from the link (and TSR/elsewhere) there's STEP I, II, III.