"Also I live in Florida, does the weather has something to do?"

Hugely so, mid-august in FL is an impossible time to get transplants to thrive. The thing to do is give those plants you bought no further thought, and while you are waiting for fall-garden planting time - a few weeks from now - read through the many, many threads on the FL gardening forum about growing vegetables there.

There are a number of veggie experts in Florida on that forum. It makes a very big difference as well as to whether you are in central florida/northwards or south central/southwards. Homestead is as different from Gainesville as Gainesville is from Atlanta, or perhaps more so.

You have to do some real research, and then expect to have several seasons of severe learning curve. Being a newbie when starting in FL is if anything an advantage, because you aren't burdened by a bunch of rules from northern gardening that simply don't apply to FL.

What pnbrown said.

The University of FL has an excellent guide to vegetable growing in FL, including recommended varieties and planting dates for different parts of the state. Link below.

Here is a link that might be useful: UF IFAS vegetable guide

Welcome to the adventure of gardening in Florida. :)

It looks like your tomato may have a virus and your pepper ha fungus or dense bug eggs. You might need to start over with the tomato.

Right about now is the time to start the fall tomato crop from seed, in flats. Get a good seed-starting (not potting) mix.