It depends on the tests: some of the simpler ones are bundled together in the 30 euro fee price as discussed above.
More specialist ones are priced per test, for example the PSA test for me is 43 euro.
Call places like the Hermitage Private clinic and ask them, I go there for my PSA test, with a letter from my doctor, was there yesterday, in and out in 13 minutes for 43 euro, same price as going through my GP, with results an hour later faxed to doctor....as opposed to waiting maybe 10 days....
Covered by my insurance: look up your policy online.