Also, i don't know if you need any advice on guns, but i recommend a 12 guage semi auto or pump, 6s and a fairly tight choke, as the shot will spread out, and it allows for a longer, more accurate shot. Scope or no scope can be debated, but i don't really think it matters. Ive shot with both and i still miss, so that's up to you.
Calls, I agree with mouthcaller. I just saw a pushbutton one this weekedn for the first time and they are SOOOOOOOOOOOO simple. Best for a beginner, and they require very little movement. FYI, incase you didn't know, turkeys see better than we do, so try NOT TO MOVE AT ALL. The next easiest thing would be a box call, then a slate/glass call, and don't even bother with freaking diaphragms.

Box call link "How to"http://www.youtube.com/watch?v=OkYDirtKwLA&feature=related

Slate call link http://www.youtube.com/watch?v=T4KLHbsY_o8
Pushbutton link http://www.cabelas.com/p-0031744227100a.shtml

Best of luck
BigBuck95 (alias: Turkeyslayer19 )