1: Yes, you can.
2: You can burn other ATMEGA168 or ATMEGA8 chips using the Arduino board but without the bootloader, you'll have to do it via ICSP using the header on the Arduino and a separate ICSP programmer.
1: Yes, you can.
2: You can burn other ATMEGA168 or ATMEGA8 chips using the Arduino board but without the bootloader, you'll have to do it via ICSP using the header on the Arduino and a separate ICSP programmer.