That symbol shows that the character's BP can be increased by abilities on the card.

That symbol shows that the card's energy generation can be augmented by abilities on the card.

Those icons show what type of trigger it is.

No, you do not. Have 3 AP cards ready to play in addition to your 50-card deck.

No, you cannot. Cards with different source material codes (the three letters following the "/" in the card number) cannot be included together in the same deck.

No. Cards with different card numbers may share the same card name, so you may include up to four copies of each card where the portion of the card number after the "/" is different, regardless of whether the card name is the same.

Yes, you can. You may also include any number of triggers that are not limited in addition to them.

Yes, you can.

Each player needs three action point cards.

The player who wins rock scissors paper gets to choose who becomes Player One.