The rower would be a great addition and is super-underappreciated, but simply doing cardio and watching calories isn’t the best way to get a better looking physique. You need to figure out some way to do some resistance training.
On a serious note, if I was you I would at least get some basic equipment to use at home. The chin up bar that Colucci mentioned is on obvious choice, you might also be able to get a dip bar that hooks onto it (I used to have one) and you could use that for inverted rows as well. Bands are cheap and don’t take up any space, another obvious choice.
You could do pushups, chinups, rows and dips if you can find that other bar, various shoulder and arm exercises with the bands, squats, single leg squats or lunges, band good mornings, and so on. Get an ab wheel too. It will be much cheaper than steroids and the only thing you are lacking is the determination.
I think Chris’s chin bar/dip bar/band advice is a good start to outfitting a garage gym, especially because they’re inexpensive and presently attainable. Ab wheel too. Maybe check out Amazon’s “iron infidel” bands.
Try High Intensity Training (HIT) according to Dr Ellington Darden, and you may get the results you ask for. I recommend his latest “Killing fat” book.
Realizing this may be an unpopular suggestion here among strongmen, but it works and is backed up by lots of experience.