is there atmega 128 basic circuit for every project?
Yes.
Only if you've programmed it with a serial bootloader already. Otherwise use ISP or HVPP as normal.
Okay? This is not a question.
AVCC must be connected. You probably also want to connect nPEN to a switch.
No. They come unprogrammed from the factory other than the ATmega103 compatibility fuse. Don't forget to unprogram that fuse before use.