Exercise help, any advice?

I am a 15 year old girl and I am not fat, although I would like to tone up. What I do to exercise is ride my bike, walk, maybe run, sit-ups and squats. Can you give me an ideal amount to do each and how often I should do it to tone up and get results quickly? Some main parts that I want to improve on is, tummy, thighs, calves, arms, and butt. Any Advice will be greatly appreciated! Thank you!
Also I am looking for immediate results, so please tell me what you think would be best. I also suck at pushups, so please don't recommend it, and there is no place to swim, so no recommendations on that either please. Thank you so much!

I would bike a lot more than I run, make sure to really push yourself on the bike ride, and remember that to have results one should get about 45-60 minutes of cardio in one sitting, I would do that a couple times a week, but still allowing for your muscles to recover

the problem most people have is burning fat, which can be done by cardio and fixing up ones diets

squats are an excellent workout, I would also suggest trying lunges, or something called Burpees, excellent

instead of situps I would recomment maybe L-hangs or what are called bicycle crunches (awesome, incredible exercise)

I would set up a workout system of maybe 3-4 times a week, with at least an hour of running or biking, not walking, and each time I would focus on a different muscle set, so the first day focus on the abs (look online for some awesome exercises), the next day I would focus on the legs, and then the arms on the third day

what this does is it gives each muscle set time to recuperate, which will help you a lot, and you should hopefully see results if you fix up your diet as well

Eat only when hungry and not more than thrice a day. Nothing other than water in between. Include plenty of uncooked vegetables and fruits in each meal, preferably 50%. Chew each morsel at least 32 times to activate ur body to generate signals of hunger/fullness. Obey these signals.

Take light exercises and brisk walks regularly preferably twice a day.

U will achieve what u have not even dreamt and that too in a reasonable time. Do not be in a hurry.

This schedule will also be helpful in maintaining good healthy weight.

I find for your stomach, the best exercise is bicycle abs. It works your whole abdomen, not just the top or the sides or the bottom. If you don't know how to do them, just google it, and it will be right there, I promise. Thigs, a great thing to do is wall sits. Put your back against a wall, then lower down until your knees are at a 90 degree angle and your knees don't go past your toes. Calves can be worked easily by just raising up and down on a stair step. Just stand with the balls of your feet on a stair, then lower yourself down and up, keeping your legs straight. Arms, there are a lot of exercises, but the best are arm circles (just putting your arms out to the side and circling them) and dips (sitting on a chair or something, then scooting forward until the only thing on the chair are your hands, then lowering your butt up and down, keeping as much weight on your arms as you can, making sure your elbows go straight backward). For the butt, you can lay down flat on the ground face-down, and keep one leg straight and the other bent upward (knee at about a 90 degree angle) then raising that leg up and down.

Also, you should keep doing cardio as much as you can, since that both tones you and gets rid of fat so that your toned muscles can show through better.