Forum:Help me please :)

Need help I have not got gta 5 yet but I'm going to soon I would like to know what mission do you unlock the Grand Senora Desert I have watch the videos on how to get a fib granger and I would like to know when I will be able to do that I also would like to know how many cars you can fit in your first garage and the last think I would like to know is what mission do you unlock the ammunation store and do you automatically unlock the flashlight attachment or do I have to wait for that!