I think NO.
Extremely difficult and costly. Crown is not "market ki car". Its a luxury car, accordingly, parts will be quite expensive, and rarely available. If available, will only be from scrapyards I believe.
YES! Depending on model year, features, trim, auction grade, etc.
Brother if you are resale conscious and worry about parts availability, you must go for a "market ki car", within a max. budget of 40-50 lac PKR.