Hello Raven1650,
Wow you have many questions to do, so let's try to break them in pieces.
Question # 1:
Quote: "In FPS games can you make using only what you eat with the program and do you only get to make in building games, or can you make games like call of duty moh etc. Can go outside where you ..."
The FPSC has the best performance on indoor game depending on the number of entities, segments, AI (artificial intelligence) in the game scene.
The FPSC has a lower performance in outdoor games and you can also import terrain meshes into FPSC, however there will not be a system of collision between the terrain ground in the game I mean if you import a terrain mesh as an entity in your game the program will not recognize the terrain as a segment, so that all entities will pass through or will remain jumping like a crazy in place.
Do games in the standard of Medal of Honor and Call of Duty is not altogether impossible, but is very, very, very difficult, next to impossible to be done due to limitations of the game engine, unfortunately.
Question # 2:
Quote: "...and can you make buildings, etc. terrains inport and them..."
Yes you can make your own 3D models, or buy them from third parties, and import them into FPSC.
Question #3:
Quote: "...if so how do you inport them ty in advance"
How to import your models in FPSC you can use the forum search tool to find your answer, however you may try using the Entity Workshop in the following link:
http://www.wehtam.co.uk/entityworkshop/
Remember that as Gamer X wrote your 3D model should be converted to .x files before import them into FPSC.
I hope this information may help you in some way.
Have fun.
Northern