From 1.2.5 ?! It won't be easy for you to get used to everything with Forge now...
ALL of those are not a part of forge as far as I'm aware, they are a part of MC it self.
Modloader "equivalent" of "onRightClick":
Function: onItemRightClick, From: Item.class
public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer)
{
return par1ItemStack;
}
Check what item is in the player's hand:
You need a function with acces to EntityPlayer/Minecraft, after you found something that suits you:
thePlayerInstance.getCurrentEquippedItem()
Getting a block that is right click:
Function: boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
Found in: Block.class
Get the block in the position the player right-clicked in and then do whatever you want.