I am newer to playing live poker and I have a question. Here is an example:

I bet 150 (1X100 and 2X25) and someone raises to 500. If I announce “CALL” am I able to add 4 100’s to my stack and pull back the 2 25’s all in one motion? I guess my questions is, if I am raised and I announce “CALL”, am I able to add and pull back chips from my original bet to get the correct amount or must I leave in my entire original bet?

Here is another example: I bet 65,000 (2X25,000 and 3X5,000) and someone raises to 150,000. At this point I announce “CALL”. To me, it is easier to see I already have 2x25,000 (50,000) chips in the pot and I can simple add 4X25,000 to get the call of 150,000. At this point I would remove the 3X5,000 (15,000) from my original bet. It is important to note that I would do this all in one motion so I am not going back and forth between my bet and my stack.

Is this bad etiquette?

If you verbalize your action, you can do whatever you want with your chips as long as they are still in front of you and you have (at least) the total call amount out at the end of the process.

You can announce call and then proceed to move your entire stack forward, throw them around like a chimp, T-bag the waitress and leave the amount to call in the pot after you're done. By announcing the call you are obligated to put no more and no less than the required amount, how you do this is irrelevant. Going back and forth between stack would not in any way be a problem unless you did not announce the call.

Even if you didn't announce call, you can put an amount less than the call and then go back/forth to complete the call. For instance sometimes people call by throwing a single chip in (often of min denomination). Once that chip is in, they've eliminated their option of folding or raising, hence it's a call.

Same is true if the chip is worth more than the call, thanks to the "one chip rule". You could throw that chip forward, then if you didn't want change for it, count out the correct call amount and swap the large chip back (like maybe on the River after seeing that you lost the showdown, or on an earlier street if there are other players to act behind you and it saves some time).

Or you can just say "Call", grab a rough amount or whatever's already in your hand, put it in and then fix it.

Why people would do stuff like that, to save time while also showing the camera that they're calling. Some places ask you to put something in even after you announce call, to prevent a scumbag from playing the, "I never said call" angle and then there's no camera proof and they don't have to pay (which I've witnessed once...whole table heard him say call, but the dealer was only 90% sure, so the floor said the guy didn't have to pay).

yea you can but be careful in what you do as house rules are never the same. just be more deliberate with your bets and calls.
make sure the pot is right or very clear what has happened before you show your hand

OP .. all looks good to me. The announcement of a call allows the action to move on to the next player and you can now go about your business in making your chips correct.

The one thing that I would caution you on is pulling your chips back before you verbalize anything. This should be held to at least a call of the raise, but in some rooms you wont be allowed to raise since it may be seen as an angle.

If I were to suggest anything it would be to 'obviously' prepare your chips for whatever you're going to do and then make your action, either verbally or not. You are already aware of possible string situations coming forth so the verbalization locks in your actions and you shouldn't be in trouble with 98% of the dealers out there.

If you watch some of the HSP episodes with Guy L (Cirque du Soleil owner) he pretty much always announces raise, then puts out the calling chips ... and then tanks on the amount of his raise. Bill Perkins is another player to do this as well. Lots of player when they first start out will make these kind of action becuase it helps them with bet sizing when they can 'see' all the chips in play before deciding on a raise size. GL