#1
Well i plan to go to guitar center tomorrow and i have one question about guitar tuners. Are there any tuners out there that can like help you tune your guitar to like drop c and all those others like F etc. ? Because sometimes i just cant figure out if i got it correctly.
#2
...they all can...

If youre going to tune your strings differently at least know what each string is tuned to!
#3
Yes, I do believe that you can manually set a tuner so that you can tune your guitar to that certain pitch. However, I have never done it and don't know much about it, so don't quote me on that.