For starters they are Nuts that you have to undo from the back of the turbo, not bolts.
Make sure you spray PLENTY of WD40 or a product that we get up here called "Bolt Off" its a penetrating spray that makes rusted nuts/bolts easy to undo. If you don't do this, then there is a good chance you will snap one of the 10+ year old studs.
If the gasket is old and looks worn, buy a new one. I would also recommend buying a tube of exhaust sealant that can be purchased from any automotive place.