first of all Winchester never made a rifle in 34 Winchester special,I am assuming that you mean 32 Winchester special.If that is the case it will use 32 Winchester special ammo.I would advise you to have a competent gunsmith go over the rifle and ensure that you have the right caliber and it is safe to shoot before going to the range.
No
No
Winchester 32 spl 170gr
Winchester model 04A takes a .22 cal round as it is intended for younger men up to adult
you should not use 32 Winchester special ammo in a 32-40 rifle! these are two complete different cartridges and you may injure yourself,and blow up a otherwise fine old marlin rifle.one of the major manufactures still load 32-40 ammo from time to time.check with Winchester,Remington or federal.There is also some small company,s that make hard to find ammo which the 32-40 is becoming,so look to the internet for your ammo.
Winchester 30-30 by any manufacturer will work for you.
Your winchester model 1400 holds 3 rounds of ammo.(1 in the chamber,and 2 in the magazine.)
.45 Long Colt.
About $100-150 given condition.
The Model 1903 used a special "proprietary" cartridge called the "22 Winchester Auto". It became obselete in the late 1930s to early 1940s. I did recently here that a special run of the ammo was made, and being carried by a supplier somewhere in the eastern part of the U.S.
It will be marked on the barrel. If you can't see it, you need to see a gunsmith.
This is a .177 pellet rifle.