Old t2 not runnin right, help!

[87fc3s]

Kk I'll try to check up on some of that shortly. The gas tank was pretty much empty before I left the car, so I guess rust may be present, I'll have to try to see. Im really hoping its something I can easily take care of quickly, I came back to help my brother move, and my car was stored at his place so I've gotta move it soon. I'm not very knowledgeable about mechanics, so I'm really hoping its as simple as plugs
How do you check the injectors? Never touched them so not quite sure how to check or deal with them. If anyone ha suggestions for a noob to do basic checks, please let me know how to go about things(sorry for all the trouble, just wanna get this thing rolling ASAP without having to call a tow)
Damn backfire sets off all alarms in the quiet little neighborhood so I kinda feel bad sitting there with the car running. I did let it sit for a while and smoke thins out a bit.