What can I get for these TF2 items

1. sell them
2. buy whatever you want
3. ?????????
4. Profit

you can use this site to check tf2 prices.

just to give you an idea of values:
1 refined = 3 reclaimed
1 rec = 3 scrap
1 scrap = 2 weapons (so 18 weps = 1 ref)

16 ref = 1 key (288 weps)
1 key = $2.18 (sells for $2.49 in the market)

Not much at all, I'm afraid. Refs can be used as currency, but ~16 ref is 1 key, so they are not all that valuable. The rest are, as far as I know it, really cheap items, many of which you get through achievements as well as random drops. Possible exceptions being the rainblower.
Scratch that, the rainblower is not even worth 0,4€.

You might be able to buy a key with the refined, but keys are probably like 10ref at this point so who knows?
Everything else is worthless.

Ok now i basically know what it's all about (site is very helpful) thank a lot again

As of now, your TF2 backpack is worth ~$1