How long will these bottles last? (Please tell how many sprays you use also.)
Depends on the size of the bottle 
Generally the 5ml TOGO bottles spray .125 mls so you’re looking at around 40 sprays.
The 30mls spray .15mls so around 200.
How many sprays you use at a time, though, depends on what actually works for you with each product - and you only find that out through experimentation.