If I want to trade weekly options on think or swim, how can i get my charts that i use on NT to work in on that platform?

NT7 doesn't support options, but I assume you know that already. Your choice is either to continue to use NT for your charting, and just execute the trades in TOS, or just abandon NT entirely and load the symbols into thinkorswim charts.

Your question is too vague for any detailed answer.

Thinkorswim has a fine platform for charting, and really good option analytics, but there are limitations with the thinkscript custom study framework. So if you have really complex studies, then I'd say just run NT and TOS side by side.