It's hard to say much about your bar without actually seeing/using it. I'm sure it's fine for a beginner.
The rack is basically the same one I have but with a different manufacturers sticker on it. It is nothing special but it will suffice.
I can't stand that grip type of plates. I'd just get a set of Standards. If you really think you need the rubber you can get it without the grip holes.
All of that stuff can easily be bought used. Craigslist is the best place to buy them. That rack shouldn't cost more than $100 used. Non-rubber plates should be no more than $.50/pound. A bar will probably be around $50. All of this stuff is fine used, with the exception possibly of a bar. the rack is just a bunch of square tubing that will last forever. Same with cast iron plates. A bar can wear out (bearings, bending, worn knurling), but it takes a long time and most used ones you find have plenty of life left in them.