It is 600 Euro per passenger (for itineraries more than 3500 km). As stated above this compensation is different from reimbursement of expenses incurred. If you want OS to reimburse hotel and meals (in addition to 600 EUR per passenger) you need to submit receipts as documentation that you actually incurred expenses. That is only fair and reasonable. EU Reg. 261/04 doesn't cover clothes.
As for any clothes or toiletries that you purchased whilst waiting for the lugagge to arrive, normally you submit such expenses to your travel insurance for easy reimbursement. If no travel insurance you can submit to OS but it will take much longer and OS will most likely only agree to reimburse 50% based on the assumption that you will keep using the clothes etc that you purchased. In principle, you would have to hand over the purchased clothes and toiletries to OS in order to be compensated 100%.