This has no answer, under the stipulation of "The technology should be as close to our current level."
Your requirement is for a SSTO, fully reuseable orbit-to-surface-to-orbit vessel.
There is NO possible chemical fuel propulsion that can achieve this, at anything like the sort of mass fractions we can achieve. You would need to make your 11000 pound lander be capable of fuelling up 300000 pounds of fuel (mass fraction 99.5%) to achieve this. And it would need to be able to land at about 90% of that mass!
SO scratch chemical fuel.
Advanced nuclear thermal might do the job, but there is no ways you could shoehorn a strong enough reactor AND the shielding for pilots AND reentry and landing gear into a 11 000 pound package. Nor even in one 50 times that mass. Multi-gigawatt reactors are heavy, and that is what you would need to launch SSTO from Earth surface.
So you need a miracle. Take the Skylon concept, make its engines (which don't exist yet) another 50% better/stronger/lighter, invent some miraculum for the landing gear, and you might be able to make this work.
So finally, your fuel. Whether Nuclear Thermal or SABRE engine derived, will be mostly liquid hydrogen, and some liquid oxygen for part of the flight regime.
Realistically, you will need to advance the technology 50-100 years or so. Allow semi-compact, low-radiation, fusion reactor that can be used as power source, hydrogen as reaction mass, and nuclear-powered plasma-accelerated hydrogen for your thrust.