If by salary you mean salary during fellowship, you just get paid at the pgy5 level, whatever that is at the program. Figure about $1,000 more than a PGY4 neuro resident.
Lifestyle depends on the institution during fellowship. Mostly you see brain tumor patients in the outpatient and inpatient consult setting. You are (usually) not the primary service on inpatient, so call isn't too bad, but again, that may vary from program to program. At some fellowship programs, you may be required to do some in- or outpatient general neurology as well, but IMHO those are crappy programs that are just scutting you out and detracting from your fellowship experience.
You will see and examine patients, devise a chemo regimine, oversee it's implementation, see the patient for follow up, etc. You will probably enroll patients in studies. Most programs require some type of research project.
Once you get out of fellowship, you will find very few places where you can do 100% neuro-onc without some general neurology on the side. Generally speaking, the bigger academic centers will let you do more pure neuro onc than smaller community places or private practice. Salary varies with location, practice type (academic < private practice) and other aspects of your practice (i.e., do you do EMG or other procedures, etc).
With regard to what drugs are used, temozolomide is the biggie nowadays. Other common meds include CCNU, vincristine, and procarbazine.
