Answer
(Fatwa: 646/460=L/1430)
(1) We could not trace this thing in any book.
(2) It is mentioned in hadith that the Prophet (صلی اللہ علیہ وسلم) purchased pajama, but it is disputed whether he put it on or not. He generally used to wear lungi and chaddar and some times lungi and kamees. So, most probably he would be wearing first lungi then chaddar or kamees; since it is more covering.
(3) It is wajib to grow beard to one fist length, trimming below it is unlawful. Imam Navavi, in the commentary of Sahih Muslim (page 129), mentioned 12 makrooh acts; one among them is to keep the beard scattered. Therefore, you should apply oil etc occasionally and let it grow.
(4) ?Shamail Kubra? is an extensive and comprehensive book. Moreover, there are other short books as well like: ?Rasoolullah ki Sunnatain? and Uswah-e-Rasool Akram.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband