print the order as soon as order is placed

[Sam_78]

Hello,
I am trying to make a standup store where customer will use my machine to order products I am done with template and now want to work on 3 things:
1: As soon as user clicks 'order now' the order will be saved in Order table? where is the current code? cart.tpl ?
2: Their card will be authorized using authorize.net extension version 1.0.1 which we have in extension tab by default? and all I need is is loginId and transaction Key to make it work?
3: (important)-- As soon as order is confirmed I want to print an invoice right then for customer and also mail him/her.. Can someone tell me where to get the code for printing functionality, I believe its under admin section?

Anyhelp is highly appreciated..
Thanks

[Basara]

Hello.

Welcome on AbanteCart forum. 

I suggest you create separate topic for each question.