Pushups & situps will tone what you have as opposed to increasing mass, and yes...it'll build stamina. Do pushups in sets of 20, and situps in sets of 50, and you'll find yourself less winded at the end of them soon.

You may want to check Freecycle in your area for a weight set. I waited too long to respond and missed out on a two year old bowflex. Oh well...we have enough places to hang laundry anyway. lmfao

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Though I am different from you,
We were born involved in one another.

For it was not into my ear you whispered, but into my heart. It was not my lips you kissed, but my soul.

Complete surrender should not just come at moments in which one faces overwhelming odds, but in the calm when it seems one is personally in complete control of one's life.