we really can't ID anything without pictures. Figs do come in all shapes and sizes, it's quite possible it is a fig. Look up ficus instead, you might have more luck. As for the bugs soak the whole pot in a bucket of water, the bugs should surface, then you can scoop them out. Make sure it drains really well before putting it back.

#2 looks like Chenopodium to me. #3 looks like Erigeron, Fleabane, to me. #4 is Malva neglecta, Mallows. HTH, Jeanne

Compare your milkweed to Asclepias amplexicaulis, clasping milkweed. Here is a link that might be useful: USDA

I'm almost 100% certain #3 is Horseweed (Conyza canadensis). It's one of those weeds that changes shape and form as it ages. In other words it starts out looking very different than it ultimately will look like when it blooms. I was just Googling images for this one and found tons of 'em at all stages of development. I have it my garden. It's easy to pull, but it seems to be around every year no matter what I do. Kevin