Apart from the frame, seat and steering, most recumbents use standard bike parts. Admittedly some ruthlessly individualistic manufacturers use decidedly odd wheel sizes. But the oily bits are usually no different from any other bike. Trikes can be a slightly different matter. Patience, mon brave.
Alternatives usually involve rear-wheel steering, leaning or both.
These can work, but if not done properly can bite. I'm glad you asked me that. See the TwosCompany page. I looked at that, and it's crammed full of abbreviations. Plus it's much harder to lift the rear wheel under braking, thereby propelling you out the front door in a most undignified manner.