Intention when making qadha of many salaahs

Q: I have qadha salaah from a certain year. I have read salaah in between but I'm not sure when my haiz fell during the year as well as which salaahs I read.

My question is, my intention for the qadha should be made from a specific date that my salaah became obligatory and each date so on till the current date, or should my intention be that, from the first of all the qadha I have right up until a number I assume I missed. 

Registering a company name

Q: Is it permissible to register a company name? Once registered, nobody has the right to use this name except myself. Also, what is the ruling regarding registering a product name under my name? After this, nobody can give their product this name except myself.

Earning halaal

Q: There is a saying written on Pakistani notes (money): رزق حلال کمانا عین عبادت ہے

Is this a hadeeth? Does that mean that one should respect money i.e. not throw it on the floor, etc.?