Q1: Does a Diaboromon token count as 1 Diaboromon for this card's effect?
Yes, it does.
Q2: Does this card itself count as 1 Diaboromon for its effect?
Yes, it does.
Lv.6 Diaboromon P-016 P Mega | Unknown | Unidentified [Your Turn] For each [Diaboromon] you have in play, this Digimon gets <Security Attack +1>. (This Digimon checks 1 additional security card.)
Lv.6 Diaboromon P-016 P Mega | Unknown | Unidentified [Your Turn] For each [Diaboromon] you have in play, this Digimon gets <Security Attack +1>. (This Digimon checks 1 additional security card.)
Lv.6 Diaboromon P-016 P Mega | Unknown | Unidentified [Your Turn] For each [Diaboromon] you have, this Digimon gets <Security A. +1>.
Lv.6 ディアボロモン P-016 P 究極体 | 不明 | 種族不明 【自分のターン】自分の「ディアボロモン」1体ごとに、このデジモンは≪セキュリティアタック+1≫(このデジモンがチェックするセキュリティの枚数+1)を得る。