50,000 mile Maintenance

[Yari-Chan]

In December of 2011 I went to the dealership to get an oil change. Of course they tell me I have other issues with my car but I declined them all. The services they recommended were:
-fuel system service=$150
-vent cleaning service=$100
-rear break service=$75 and
-4 wheel alignment=$120.

I just got my snow tires taken off at Costco and put my all weather tires back on so I don't need a 4 wheel alignment but I'm not sure what the other services entail. Does anyone know if these services are really necessary? I am going to get another oil change at a different Toyota dealership next week. We will see if they think I need the same services. I have 50,000 miles on my 2009 Yaris Sedan.

Any recommendations, suggestions and information are greatly appreciated.

Thanks in advance,
Akiko