How can I make it so that an object is somewhere like say outsidwe a castle, and it blocks the entrance.... then i want it to be removed after another event happens at a different map/place?
Just make your event that gets rid of the block have a switch.Then go back to your event that is used as the block and make a new page in the event.In this page you just made,set your trigger condition to the switch you used to get rid of the block.Make sure you set the second graphic to underneath char.
This question kinda goes along with what i said earlier ... but if i want to have an event happen only after another event... but ive alredy have a switch for the event... would i create a new page or use the other switch slot.
A 3 page event then? If switch 2 is completely dependant on switch 1, you only need to use one precondition slot. You CAN use both slots though - it won't affect anything.
And yeah, switches can affect the entire game, not just the map where you set it..