93altima

I have a 4 cyl 1993 Altima with 180,000 miles. The car almost wouldn't start and then when I was driving it was missing really bad - car was jerking a lot. Nissan dealership codes indicated the Camshaft position sensor and the ignition signal primary. They said a new distributor would fix both of these things - that there is oil in the distributor. Since I don't want to sink too much $$ into this old car I may try to install a new distributor myself using AutoZone parts. Here are my questions:

1. Does this sound like the problem?
2. Would a new distributor take care of the Camshaft position sensor and the ignition signal primary - or do I need to buy other parts also?
3. Should I also put on a new rotor and cap?
4. Is this easy enough for someone with avg mechanical skills to replace

Thanks for any help you can give!