Vaccinations for dogs

Question
I'm adopting an 8 pound neutered chihuahua / terrier mix about 1-2 years old, in very good general health. It has apparently received it's initial shots but since I don't have the medical records to be on the safe side I will need to reinnoculate.  Is the rabies booster shot given about once a year? There is a vacination called 5 in 1 which covers the remainder of the important diseases that need to be innoculated against. Is that one also given once a year? The other shots deal with Kennel cough and Lyme disease. How important are these and how often should they be administered? Are there any other vaccinations that I should consider or that are considerd very important?

Answer
Hi there and congrats on your new addition!
Since this is such a tiny dog, I would definitely recommend doing vaccine titers instead of vaccinating again.  Your veterinarian will simply draw a sample of blood and send it to the lab.  The results will be in within 10 days, informing whether or not your dog needs vaccines.
Each veterinarian feels differently about vaccinating.  Some vaccinate every year, where others feel as though pets do not need vaccines every year.  Talk to your veterinarian about what he/she prefers.  
You seem to have all the routine vaccinations listed. The rabies vaccine, the booster vaccine, bordatella (kennel cough) and the lyme booster. If you are planning to board your dog, the bordatella vaccine would be a good idea.  I tend to feel as though it is not worth it if the dog will not be boarding.  The rabies vaccine is required by law, and the booster vaccine is very important to protect against the major dog diseases.  The lyme vaccine is a very good idea, although it is not 100% effective.
I hope this helps.
Hilary