Yes, "Mon ami" should be capitalized as you have written it, with the M in Mon and the A in ami both capitalized.
Yes, both "Police Officer" and "McDougal" should be capitalized as they are proper nouns.
"Ransom" and "Red Chief" should both be capitalized correctly.
Yes, both "Iodine" and "Iron" should be capitalized when referring to the chemical elements.
Yes, "Pool Party" should be capitalized because both words are proper nouns.
Yes, "Mon ami" should be capitalized as you have written it, with the M in Mon and the A in ami both capitalized.
Yes they should be capitalized.
Both of them should be.
Yes, both Hindu and Hinduism should always be capitalized.
Yes, both "Police Officer" and "McDougal" should be capitalized as they are proper nouns.
"Ransom" and "Red Chief" should both be capitalized correctly.
Yes, both "Iodine" and "Iron" should be capitalized when referring to the chemical elements.
Yes, "Pool Party" should be capitalized because both words are proper nouns.
Yes, "Swiss" and "ambassador" should both be capitalized when referring to the Swiss Ambassador as a proper noun.
Yes, both Bible and Scripture should always be capitalized. However, biblical and scriptural, unless at the beginning of a sentence, should not be capitalized.
* If you have just met this lady and do not know her well you can still call her by her first name or, if you are dating you could say 'Dear Jane' and continue on from there. If you both are new to the relationship then sign it 'Fondly Yours' and sign it with your first name only. If this lady is just an acquaintance and elderly then you should address her as: Dear Mrs. Doe
Yes, "Bldg" stands for "Building," so both the abbreviation and the word "Building" should be capitalized. So, it should be written as "Bldg" or "Building."