No, you cannot get Flu from the injected Flu Vaccination, it's not a "live" vaccine it only contains proteins to train the immune system.
No, you Cannot get Pneumonia from the Flu Vaccination, but make sure you have had the pneumococcus vaccine if you are in an at-risk group.
No, you cannot develop Autism from a vaccine.
Yes, you might get a slight fever from a vaccination, this is just your immune system learning to recognise the target of the vaccine.
Yes, you might get a slightly sore/bruised arm at the injection site as it is an intramuscular injection.
The children's nose spray flu vaccine is a live virus, but it is in such a minute amount that will not give you flu (except in vanishingly rare cases) unless you have an underlying immune-suppressing condition, in which case you must have the jab.
Now don't be a prick go get a prick, unless your GP or consultant has specifically told you you shouldn't have it, such as in the case of those receiving chemo/radiotherapy.
....oh! and magic water (homoeopathy) won't stop you getting a virus.