1. Can other races use Heritage Armor?
Heritage Armor is account wide,so all blood elf characters on your account can use it. Other races can't put it on.
2.I purchase a 110 boosting from battle.net, Can I get Heritage Armor？
No. you can't. You should level your character up to 120 by hand.
3. I purchase a race transfer to blood elf service on battle.net, Can my other race character use blood elf heritage Armor?
Yes. If you have obtained blood elf armor on your account. other races after race trasfer to blood elf service can use blood elf heritage armor.
How to buy：
FFXIV Power Leveling
FFXIV Raid Boost
Black Desert Silver
DFO Power Leveling
Using illegal leveling and gold service might terminate the account!