Expat compensation in Manila

I am preparing a expat compensation for employee moving from India to Philippines. Wanted to understand few things:

1.Cost of living index
2.Car rental cost in Manila
3. What happens to PF and Gratuity when you move from india to Philippines
4.How will the tax work.

Compared to India the cost of living in Manila is a little bit higher. One tip I would also give is that don't rent a car. Maybe just buy one. Renting cars are expensive.