If I remember, t'was four hundred pesos when I applied for membership. Dunno if they increased the price.
Also, I believe it's P40 for the rentals (both DVD and VHS--haven't tried their laserdiscs, though).
Normally, they let you keep those you rented for a week (I admit, sometimes I go beyond the one-week period, but I go there often noon, kaya siguro nakilala na rin yung mukha ko dun hehe)
Nope, they don't. I just drove there one time after work (I also inquired the details of the store from one of the members here, i think si X44 ata), and signed up with them.